61-671: The Bay Area Ridge Trail (shortened as Ridge Trail ) is a planned 550-mile (890 km) multi-use trail along the hill and mountain ridgelines surrounding the San Francisco Bay Area , in Northern California . As of May 2022, 400 miles (640 km) have been established. When complete, the trail will connect over seventy-five parks and open spaces. The trail is being designed to provide access for hikers, runners, mountain bicyclists, and equestrians . It will be accessible through trailheads near major population centers, but
122-502: A Fisheries Enhancement Program since 1996. Its website says: "The primary focus of the FEP is to enhance habitat for three salmonids : Steelhead , Chinook salmon , and Coho salmon . These three species are listed as threatened under the U.S. Endangered Species Act . The California Department of Fish and Game considers the Coho salmon endangered." [REDACTED] U.S. Route 101 U.S. Route 101
183-535: A bill that resulted in Santa Rosa being confirmed as county seat in 1854. Allegedly, several Santa Rosans, not caring to wait, decided to take action and, one night, rode down the Sonoma Valley to Sonoma, took the county seals and records, and brought them to Santa Rosa. Some of the county's land was annexed from Mendocino County between 1850 and 1860. Early post-1847 settlement and development focused primarily on
244-414: A bustling center of trade, taking advantage of its position on the river near a region of highly productive agricultural land that was being settled. Soon, other inland towns, notably Santa Rosa and Healdsburg began to develop similarly due to their locations along riparian areas in prime agricultural flatland. However, their development initially lagged behind Petaluma which, until the arrival of railroads in
305-498: A fair amount of rain, with much of the county receiving between about 25 in (640 mm), comparable to areas such as Sonoma and Petaluma, and roughly 30 in (760 mm) normal for Santa Rosa. However, certain areas, particularly in the north-west portion of the county around the Russian River, receive significantly more rainfall. The Guerneville area, for example, typically receives about 50 in (1,300 mm) of rain
366-514: A larger geomorphological and/or structural feature. Frequently, a ridge can be further subdivided into smaller geomorphic or structural elements. As in the case of landforms in general, there is a lack of any commonly agreed classification or typology of ridges. They can be defined and classified on the basis of a variety of factors including either genesis, morphology, composition, statistical analysis of remote sensing data, or some combinations of these factors. An example of ridge classification
427-1259: A retired engineer, and Bob Cowell, a retired fire chief, completed the first hike of the Ridge Trail in 1999. The pair followed designated and non-designated trails, including a crossing of the Carquinez Strait by kayak. The first two segments of the trail, dedicated on May 13, 1989, were located in San Mateo County and managed by the Midpeninsula Regional Open Space District and the San Mateo County Department of Parks. Marin County and San Francisco City and County opened their first segments in September 1989; Napa , Solano , and Santa Clara counties in October 1989; Contra Costa and Alameda counties in June 1990; and Sonoma County in October 1990. Existing trails in public spaces were incorporated into
488-540: A year, with annual rain occasionally going as high as 70 in (1,800 mm). Nearby Cazadero typically receives about 72 in (1,800 mm) of rain a year, many times has reached over 100 in (2,500 mm) a year, and sometimes over 120 in (3,000 mm) of rain in a year. The Cazadero region is the second wettest place in California after Gasquet . Snow is exceedingly rare in Sonoma County, except in
549-928: Is Santa Rosa . Sonoma County comprises the Santa Rosa-Petaluma Metropolitan Statistical Area , which is part of the San Jose - San Francisco - Oakland , CA Combined Statistical Area . It is the northernmost county in the nine-county San Francisco Bay Area region. In California's Wine Country region, which also includes Napa, Mendocino, and Lake counties, Sonoma County is the largest producer. It has nineteen approved American Viticultural Areas and more than 350 wineries. The voters have twice approved open space initiatives that have provided funding for public acquisition of natural areas, preserving forested areas, coastal habitat , and other open space. More than 8.4 million tourists visit each year, spending more than $ 1 billion in 2016. Sonoma County
610-453: Is Sonoma County's richest area of wildlife habitat, and the most biologically diverse region of Sonoma County (itself the second-most biologically diverse county in California)... It is a unique ecological system covering more than 30,000 acres (120 km ) and comprisedof a mosaic of creeks, open water, perennial marshes, seasonal wetlands, riparian forests, oak woodlands, and grasslands... As
671-473: Is a leading producer of hops, grapes, prunes, apples, as well as dairy and poultry products, largely due to the extent of available, fertile agricultural land in addition to the abundance of high-quality water for irrigation. Agriculture is largely divided between two nearly monocultural uses: grapes and pasturage. The Pomo , Coast Miwok and Wappo peoples were the earliest human settlers of Sonoma County, between 8000 and 5000 BC, effectively living within
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#1732844176021732-416: Is in the watershed of the Russian River and its tributaries. The river rises in the coastal mountains of Mendocino County, north of the city of Ukiah , and flows into Lake Mendocino , a major flood control reservoir. The river flows south from the lake through Mendocino to Sonoma County, paralleled by Highway 101. It turns west at Healdsburg, receiving water from Lake Sonoma via Dry Creek , and empties into
793-731: Is just the southeastern portion of the county, which includes many other valleys and geographic zones, including the Petaluma Valley, the Santa Rosa Plains , the Russian River , the Alexander Valley , and the Dry Creek Valley . Distinct habitat areas within the county include oak woodland , redwood forest , northern coastal scrub , grassland , marshland , oak savanna and riparian woodland . The California oak woodland in
854-545: Is partly a result of the presence of high and low pressures in inland California, with persistent high summer temperatures in the Central Valley , in particular, leading to low pressures, drawing in moist air from the Pacific, cooling into damp cool breezes and fog over the cold coastal water. Those places further inland and particularly in the lee of significant elevations tend to receive less rain and less, in some cases no, fog in
915-661: Is that of Schoeneberger and Wysocki, which provides a relatively simple and straightforward system that is used by the USA National Cooperative Soil Survey Program to classify ridges and other landforms. This system uses the dominant geomorphic process or setting to classify different groups of landforms into two major groups, Geomorphic Environments and Other Groupings with a total of 16 subgroups. The groups and their subgroups are not mutually exclusive; landforms, including ridges, can belong to multiple subgroups. In this classification, ridges are found in
976-463: Is the westernmost Federal highway in the U.S.A. Running north/south through the states of California, Oregon , and Washington, it generally parallels the coastline from Downtown Los Angeles to the Canada–US border . Highway 101 links seven of the county's nine incorporated cities: Cloverdale, Healdsburg, Windsor, Santa Rosa, Rohnert Park, Cotati, and Petaluma. It is a freeway for its entire length within
1037-655: Is water. The county lies in the North Coast Ranges of northwestern California. Its ranges include the Mayacamas and the Sonoma Mountains , the southern peak of the latter being the prominent landform Sears Point . The highest peak in the Mayacamas within the county and the highest peak in the county is Mt. Saint Helena . It has uncommon occurrences of pygmy forest , dominated by Mendocino cypress . The highest peak of
1098-575: The California clapper rail ( Rallus longirostris obsoletus ), salt marsh harvest mouse ( Reithrodontomys raviventris ), northern red-legged frog ( Rana aurora ), Sacramento splittail ( Pogonichthys macrolepidotus ), California freshwater shrimp ( Syncaris pacifica ), showy Indian clover ( Trifolium amoenum ), Hickman's potentilla ( Potentilla hickmanii ), northern spotted owl (Strix occidentalis caurina), and marbled murrelet (Brachyramphus marmoratus). Species of special local concern include
1159-540: The California tiger salamander ( Ambystoma californiense ), coho salmon , and some endangered plants, including Burke's goldfields ( Lasthenia burkei ), Sebastopol meadowfoam ( Limnanthes vinculans ), and Sonoma sunshine or Baker's stickyseed ( Blennosperma bakeri ). Endangered species that are endemic to Sonoma County include Sebastopol meadowfoam, Sonoma sunshine, and Pitkin Marsh lily ( Lilium pardalinum subsp. pitkinense ). The Sonoma County Water Agency has had
1220-510: The 1860s, remained the primary commercial, transit, and break-of-bulk point for people and goods in the region. After the arrival of the San Francisco and North Pacific Railroad in 1870, Santa Rosa began to boom, soon equalling and then surpassing Petaluma as the region's population and commercial center. The railroad bypassed Petaluma for southern connections to ferries of San Francisco Bay . Six nations have claimed Sonoma County from 1542 to
1281-469: The Aeolian, Coastal Marine and Estuarine, Lacustrine, Glacial, Volcanic and Hydrothermal, Tectonic and Structural, Slope, and Erosional subgroups. Sonoma County, California Sonoma County ( / s ə ˈ n oʊ m ə / ) is a county located in the U.S. state of California . As of the 2020 United States Census , its population was 488,863. Its seat of government and largest city
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#17328441760211342-657: The East Bay, and the views from the office inspired his vision of a hill-and-ridge trail encircling the Bay and linking its communities. The plan would later attract bipartisan support, with George Miller joining Mott. In May 1987, the Greenbelt Alliance held a meeting to strategize how to approach the San Francisco Water Department and convince them to open their watershed lands to the public; Mark Evanoff convened
1403-550: The Marin County border at the Petaluma River and the border with Solano County at Sonoma Creek . Sonoma County has no incorporated communities directly on the shore of San Pablo Bay. The Petaluma River, Tolay Creek , and Sonoma Creek enter the bay at the county's southernmost tip. The intertidal zone where they join the bay is the vast Napa Sonoma Marsh . Americano Creek , the Petaluma River, Tolay Creek, and Sonoma Creek are
1464-571: The Native Americans of the entire region, and doling out the lands for large estates and ranches. The City of Sonoma was the site of the Bear Flag Revolt in 1846. Sonoma was one of the original counties when California became a state in 1850, with its county seat originally the town (now city) of Sonoma. However, by the early 1850s, Sonoma had declined in importance in both commerce and population, its county buildings were crumbling, and it
1525-541: The Pacific Ocean at Jenner . The Laguna de Santa Rosa is the largest tributary of the Russian River. It is 14 miles (23 km) long, running north from Cotati to the Russian River near Forestville. Its flood plain is more than 7,500 acres (30 km ). It drains a 254-square-mile (660 km ) watershed, including most of the Santa Rosa Plain. The Laguna de Santa Rosa Foundation says: The Laguna de Santa Rosa
1586-567: The Ridge Trail, extending the trail to 100 miles (160 km) by 1990 and 200 miles (320 km) by 1995. By 1999, 217 miles (349 km) of the Ridge Trail had been completed, mostly on public lands. 10 miles (16 km) of the Ridge Trail were added in 2005, including a new bridge over San Geronimo Creek ; at that point, the Ridge Trail ran for 285 miles (459 km). The section of Ridge Trail through Crockett Hills Regional Park in Contra Costa County, which opened in June 2006, pushed
1647-717: The Sonoma County Historical Society counts 380 landmarks recognized by several agencies. According to the book California Place Names , "The name of the Indian tribe is mentioned in baptismal records of 1815 as Chucuines or Sonomas , by Chamisso in 1816 as Sonomi , and repeatedly in Mission records of the following years." According to the Coast Miwok and the Pomo tribes that lived in the region, Sonoma translates as "valley of
1708-567: The Sonoma Mountains is Sonoma Mountain itself, which boasts two significant public access properties: Jack London State Historic Park and Fairfield Osborn Preserve . The county includes the City of Sonoma and the Sonoma Valley , in which the City of Sonoma is located. However, these are not synonymous. The City of Sonoma is merely one of nine incorporated cities in the county. The Sonoma Valley
1769-455: The Sonoma Valley, east of Petaluma, are similar, with highs typically in the very high 70s F to 80 °F (27 °C). This is in part due to the presence of the Sonoma Mountains between Petaluma and Sonoma. Cloverdale , far to the north and outside of the Santa Rosa Plain, is significantly hotter than any other city in the county, with rare evening-morning fog and highs often in the 90s, reaching 100 °F (38 °C) much more frequently than
1830-651: The Walbridge Fire burned 55,209 acres (22,342 ha) in the western part of the county; then in September–October the Glass fire affected the city of Santa Rosa and ultimately destroying 1,000+ buildings The county also had a wildfire in the 1870s that is compared to the Hanley fire and Tubbs fire because they burned in the same path. The Sonoma County Landmarks Commission recognizes nearly 200 formal historical landmarks and
1891-494: The city of Sonoma, then the region's sole town and a common transit and resting point in overland travel between the region and Sacramento and the gold fields to the east. However, after 1850, a settlement that soon became the city of Petaluma began to grow naturally near the farthest navigable point inland up the Petaluma River . Originally a hunting camp used to obtain game to sell in other markets, by 1854 Petaluma had grown into
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1952-427: The coast, with strong marine influence, tends to have low diurnal temperature fluctuation, with summer highs much cooler than the inland towns, typically 65–75 °F, yet lows in the high 40s to low 50s F, fairly comparable to most inland towns. These microclimates are evident during the rainy seasons as well, with great variation in the amount of rainfall throughout the county. Generally, all of Sonoma County receives
2013-458: The county's beaches were listed as among the cleanest in the state in 2010. Six of the county's nine cities, from Healdsburg south through Santa Rosa to Rohnert Park and Cotati, are in the Santa Rosa Plain. The northern Plain drains directly to the Russian River, or to a tributary; the southern Plain drains to the Russian River via the Laguna de Santa Rosa . Much of central and northern Sonoma County
2074-497: The county. The four-lane sections of the highway have been heavily congested during peak commute hours for many years and work is being done to widen part of the highway to six lanes. The segment from north of Petaluma (at Old Redwood Highway/Petaluma Boulevard North exit) to Windsor has been fully widened, as has the segment from the Petaluma River bridge to the Marin County border. The two new inner lanes are designated for vehicles with two or more occupants during commute hours. Work
2135-404: The county. In summer, daily lows and highs are typically 30–40 °F apart inland, with highs for Petaluma, Cotati, Rohnert Park, Santa Rosa, Windsor, and Sebastopol typically being in the very low 80s F and lows at or near 50 °F (10 °C). Healdsburg and the City of Sonoma, with similar lows, have even greater diurnal fluctuations due to their significantly warmer highs. On the other hand,
2196-542: The earth; and noma , village; hence tsonoma , "earth village." Other sources say Sonoma comes from the Patwin tribes west of the Sacramento River , and their Wintu word for "nose". Per California Place Names , "the name is doubtless derived from a Patwin word for 'nose', which Padre Arroyo (Vocabularies, p. 22) gives as sonom ( Suisun )." Spaniards may have found an Indian chief with a prominent protuberance and applied
2257-689: The first newcomers to establish a permanent foothold in Sonoma County, with the Russian-American Company establishing Fort Ross on the Sonoma Coast in 1812. This settlement and its outlying Russian settlements came to include a population of several hundred Russian and Aleut settlers and a stockaded fort with artillery. However, the Russians abandoned it in 1841 and sold the fort to John Sutter , settler and Mexican land grantee of Sacramento . The Mission San Francisco Solano , founded in 1823 as
2318-416: The fog later in the evening, the fog tends to be more short-lived, and mid-day temperatures are significantly higher than they are on the coast, typically in the low 80s F. This is particularly true for Petaluma, Cotati , and Rohnert Park , and, only slightly less so, Santa Rosa, Windsor , and Sebastopol . In large part, this results from lower elevations and the prominent Petaluma Gap in the hills between
2379-599: The higher elevations on and around the Mayacamas Mountains , particularly Mount Saint Helena , and Cobb Mountain , whose peak is in Lake County. Sonoma County is bounded on the west by the Pacific Ocean, and has 76 miles (122 km) of coastline. The major coastal hydrographic features are Bodega Bay , the mouth of the Russian River, and the mouth of the Gualala River , at the border with Mendocino County . All of
2440-475: The last and northernmost of 21 California missions , is in the present City of Sonoma , at the northern end of El Camino Real . El Presidio de Sonoma , or Sonoma Barracks (part of Spain's Fourth Military District ), was established in 1836 by Comandante General Mariano Guadalupe Vallejo . His duties included keeping an eye on the Russian traders at Fort Ross, secularizing the Mission, maintaining cooperation with
2501-642: The meeting and Brian O'Neill , Superintendent of the Golden Gate National Recreation Area , proposed a potential strategy to pursue the goals outlined in the report by the President's Commission on Americans Outdoors. Later that year, a planning committee was formed with memberships from nearly forty public agencies, recreation groups, and individuals. Eventually, this committee became the Bay Area Ridge Trail Council. Dinesh Desai,
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2562-555: The moon" or "many moons". Their legends detail this as a land where the moon nestled, hence the names Sonoma Valley and the "Valley of the Moon." This translation was first recorded in an 1850 report by General Mariano Guadalupe Vallejo to the California Legislature. Jack London popularized it in his 1913 novel The Valley of the Moon . In the native languages there is also a constantly recurring ending tso-noma , from tso ,
2623-433: The natural carrying capacity of the land. Archaeological evidence of these First people includes a number of occurrences of rock carvings , especially in southern Sonoma County; these carvings often take the form of pecked curvilinear nucleated design. Spaniards , Russians , and other Europeans claimed and settled in the county from the late 16th to mid-19th century, seeking timber, fur, and farmland. The Russians were
2684-421: The nickname of Chief Nose to the village and the territory. The name may have applied originally to a nose-shaped geographic feature. Jesse Sawyer argues that it is from Wappo tso-noma , meaning "redwood place." According to the U.S. Census Bureau , the county has an area of 1,768 square miles (4,580 km ), of which 1,576 square miles (4,080 km ) is land and 192 square miles (500 km ) (10.9%)
2745-444: The oak woodland habitat include Pacific madrone , Douglas fir , coast live oak , Garry oak , and California laurel . Common understory plants are toyon , poison oak , and, at the fringes, coast silk-tassel . Sonoma County, as is often the case with coastal counties in California, has a great degree of climatic variation and numerous, often very different, microclimates. Key determining factors for local climate are proximity to
2806-404: The ocean to the west and the Petaluma Valley and Santa Rosa Plain to the east. Areas north of Santa Rosa and Windsor, with larger elevations to the west and further from the fog path, tend to receive less fog and less summer marine influence. Healdsburg, to the north of Windsor, is less foggy and much warmer, with summer highs typically in the higher 80s to about 90 °F (32 °C). Sonoma and
2867-460: The ocean, elevation, and the presence and elevation of hills or mountains to the east and west. This is in large part due to the fact that, as throughout California, the prevailing weather systems and wind come normally from the Pacific Ocean, blowing in from the west and southwest, so that places closer to the ocean and on the windward side of higher elevations tend to receive more rain from autumn through spring and more summer wind and fog. This itself
2928-458: The other cities. Notably, however, the temperature differences among the different areas of the county are greatest for the highs during mid-day, with the diurnal lows much more even throughout the entire county. The lows are closely tied to the evening-morning cooling marine influence, in addition to elevation, bringing similarly cool temperatures to much of region. These weather patterns contribute to high diurnal temperature fluctuations in much of
2989-564: The present: Sonoma County was severely shaken by the 1906 San Francisco earthquake . The displacements along the fault averaged 15 feet (4.6 m). In October 2017, the county was greatly affected by the Tubbs Fire and the Nuns Fire . In late October and early November 2019, the Kincade Fire burned 77,758 acres (31,468 ha), almost all in Sonoma County. In August and September 2020,
3050-674: The principal streams draining the southern portion of the county. The Sonoma Valley is drained by Sonoma Creek, whose major tributaries are Yulupa Creek , Graham Creek , Calabazas Creek , Schell Creek, and Carriger Creek ; Arroyo Seco Creek is a tributary to Schell Creek. Other creeks include Foss, Felta, and Mill. Lakes and reservoirs in the county include Lake Sonoma, Tolay Lake , Lake Ilsanjo , Santa Rosa Creek Reservoir , Lake Ralphine , and Fountaingrove Lake . Like underwater parks, these marine protected areas help conserve ocean wildlife and marine ecosystems. A number of endangered plants and animals are found in Sonoma County, including
3111-415: The receiving water of a watershed where most of the county's human population lives, it is a landscape feature of critical importance to Sonoma County's water quality, flood control, and biodiversity. The Laguna's largest tributary is Santa Rosa Creek , which runs through Santa Rosa. Its major tributaries are Brush Creek , Mark West Creek, Matanzas Creek , Spring Creek , and Piner Creek . Santa Rosa Creek
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#17328441760213172-576: The remaining mileage is on private property in Santa Clara, Sonoma, and Napa. Starting at the Golden Gate Bridge and proceeding clockwise, the route goes through every Bay Area county: Marin , Sonoma , Napa , Solano , Contra Costa , Alameda , Santa Clara , Santa Cruz , San Mateo , and San Francisco . The planned alignment of the Ridge Trail extends as far north as Calistoga and Angwin , and as far south as Gilroy . From south to north,
3233-549: The summer. The coast itself is typically cool and moist throughout summer, often foggy, with fog generally blowing in during the late afternoon and evening until it clears in the later morning becoming sunny, before repeating. Coastal summer highs are typically in the mid to high 60s, warming to the low 70s further from the ocean. Certain inland areas, including the Petaluma area and the Santa Rosa Plain, are also prone to this normal fog pattern in general. However, they tend to receive
3294-509: The terrain dropping down on either side. The crest, if narrow, is also called a ridgeline . Limitations on the dimensions of a ridge are lacking. Its height above the surrounding terrain can vary from less than a meter to hundreds of meters. A ridge can be either depositional , erosional , tectonic , or a combination of these in origin and can consist of either bedrock , loose sediment , lava , or ice depending on its origin. A ridge can occur as either an isolated, independent feature or part of
3355-567: The trail passes through the following landmarks: Lake Merced , Stern Grove , Twin Peaks , Buena Vista Park , the panhandle of Golden Gate Park , and the Presidio . (1.6 kilometers) (1.6 kilometers) The Bay Area Ridge Trail Council (BARTC), founded in 1987, is the organization building, maintaining, and promoting the Ridge Trail. BARTC initially was supported by the Greenbelt Alliance, but it
3416-548: The trail past the 300-mile (480 km) mark. As of 2020, the Ridge Trail stood at 383 miles (616 km) completed. The section of the trail that runs through San Francisco has been completed, and parts of the San Francisco trail have been rerouted to pass through more green space and over the Twin Peaks . Large sections of the trail running through San Mateo, Marin, Contra Costa, and Alameda counties have been completed. Much of
3477-584: The trail will extend into more remote areas. The first trail section was dedicated on May 13, 1989. William Penn Mott Jr. , the twelfth director of the National Park Service , gave a speech in March 1987 at a state parks and recreation conference and discussed plans for the Ridge Trail. While working for the East Bay Regional Park District in the 1960s, Mott's office was on a ridgeline in
3538-504: The upper Yulupa Creek and Spring Creek watersheds in Annadel State Park is a relatively undisturbed ecosystem with considerable biodiversity . These forested areas have been characterized as some of the best examples of such woodlands. An unusual characteristic of these forests is the high content of undisturbed prehistoric bunchgrass understory , testifying to the absence of historic grazing or other agriculture . Trees of
3599-466: Was incorporated in 1991 as a 501(c)(3) nonprofit under co-chairs Brian O'Neill and Marcia McNally. The Council office is located in Berkeley . Ridge A ridge is a long, narrow, elevated geomorphologic landform , structural feature , or a combination of both separated from the surrounding terrain by steep sides. The sides of a ridge slope away from a narrow top, the crest or ridgecrest , with
3660-489: Was relatively remote. As a result, elements in the newer, rapidly growing towns of Petaluma , Santa Rosa, and Healdsburg began vying to move the county seat to their towns. The dispute ultimately was between the bigger, richer commercial town of Petaluma and the more centrally located, growing agricultural center of Santa Rosa. The fate was decided following an election for the state legislature in which James Bennett of Santa Rosa defeated Joseph Hooker of Sonoma and introduced
3721-534: Was shown to be polluted in Sonoma county first flush results. The boundary with Marin County runs from the mouth of the Estero Americano at Bodega Bay , up Americano Creek, then overland to San Antonio Creek and down the Petaluma River to its mouth at the northwest corner of San Pablo Bay , which adjoins San Francisco Bay . The southern edge of Sonoma County comprises the northern shore of San Pablo Bay between
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