Napa County is a county north of San Pablo Bay located in the northern portion of the U.S. state of California. As of the 2020 census, the population was 138,019. The county seat is the City of Napa. Napa County was one of the original counties of California, created in 1850 at the time of statehood. Parts of the county's territory were given to Lake County in 1861.
The Napa River is a river approximately 55 miles (89 km) long in the U.S. state of California. It drains a famous wine-growing region called the Napa Valley, in the mountains north of the San Francisco Bay. Milliken Creek and Mt. Veeder watersheds are a few of its many tributaries. The river mouth is at Vallejo, where the intertidal zone of fresh and salt waters flow into the Carquinez Strait and the San Pablo Bay.
Halloran Springs is a set of springs in the Mojave Desert in San Bernardino County, California, United States. It is located on Interstate 15 between Baker, California and Las Vegas, Nevada approximately 15 miles (24 km) northeast of Baker.
Putah Creek is a major stream in Northern California, a tributary of the Yolo Bypass, and ultimately, the Sacramento River. The 85-mile-long (137 km) creek has its headwaters in the Mayacamas Mountains, a part of the Coast Range, and flows east through two dams. First, Monticello Dam forms Lake Berryessa, below which Putah Creek forms the border of Yolo and Solano Counties, and then flows to the Putah Diversion Dam and Lake Solano. After several drought years in the late 1980s, the majority of Putah Creek went dry, prompting a landmark lawsuit that resulted in the signing of the Putah Creek Accord in 2000. The Accord established releases from the dams to maintain stream flows in Putah Creek, with natural flow regimes which spike in winter/spring and ebb in summer/fall. The restoration of natural flow regimes has resulted in a doubling of riparian bird species and a return of spawning native steelhead trout and Chinook salmon, as well as protecting the livelihood of farmers on the lower watershed.
Sonoma Creek is a 33.4-mile-long (53.8 km) stream in northern California. It is one of two principal drainages of southern Sonoma County, California, with headwaters rising in the rugged hills of Sugarloaf Ridge State Park and discharging to San Pablo Bay, the northern arm of San Francisco Bay. The watershed drained by Sonoma Creek is roughly equivalent to the wine region of Sonoma Valley, an area of about 170 square miles (440 km2). The State of California has designated the Sonoma Creek watershed as a “Critical Coastal Water Resource”. To the east of this generally rectangular watershed is the Napa River watershed, and to the west are the Petaluma River and Tolay Creek watersheds.
Milliken Creek is an 11.9-mile-long (19.2 km) stream in Napa County, California, that is tributary to the Napa River. There are approximately 7,300 acres (3,000 ha) in this watershed, of which 90 acres (36 ha) are developed as vineyards. Milliken Creek rises on the western slopes of the east side of the Napa Valley and flows through the Silverado Country Club property. Much of this watershed property had once been part of the Mexican land grant Rancho Yajome, which had been granted to General Mariano G. Vallejo. Most of this watershed was wilderness area to at least 1869, and thereafter the lower watershed was begun to be developed as pasture and grazing agricultural uses. In a 1989 stream survey by Earth Metrics, the steelhead fishery was found to be robust up to and including the Silverado Country Club.
Tolay Creek is a 12.5-mile-long (20.1 km) southward-flowing stream in southern Sonoma County, California, United States, which flows through Tolay Lake and ends in north San Pablo Bay.
Mark West Springs is set of springs in eastern Santa Rosa, California that were used as a resort since 1880 and perhaps earlier. Mark West Springs is located on Porter Creek Road in the Mayacamas Mountains. Mark West Creek flows through the community.
Mark West Creek is a 29.9-mile-long (48.1 km) stream that rises in the Mayacamas Mountains of Sonoma County, California, United States. Tributaries of Mark West Creek include Porter Creek and Hummingbird Creek, both of which originate in the same mountain range. Discharge waters of Mark West Creek reach the Russian River after a confluence with the Laguna de Santa Rosa. The Community Clean Water Institute has developed a program for monitoring pollutants in Mark West Creek.
The Silverado Resort and Spa is a 1,200-acre (4.9 km2) golf, tennis, and spa resort in Napa County, California, United States. The venue is named after the Silverado Mine, a quicksilver mine near Mount Saint Helena. The resort is the fifth largest employer in Napa County.
Santiago Creek is a major watercourse in Orange County in the U.S. state of California. About 34 miles (55 km) long, it drains most of the northern Santa Ana Mountains and is a tributary to the Santa Ana River. It is one of the longest watercourses entirely within the county. The creek shares its name with Santiago Peak, at 5,687 ft (1,733 m) the highest point in Orange County, on whose slopes its headwaters rise.
Adams is an unincorporated community in Lake County, California. It was formerly Adams Springs, a summer resort developed around a small group of mineral water springs.
Parramore Springs is a spring in Lake County, California.
Saratoga Springs is a set of springs that was turned into a resort in the 1870s in Lake County, California. At its peak the resort could accommodate 250 people. The resort was closed after the main hotel burned down, but reopened as a retreat in 1991.
Witter Springs is a set of springs that was turned into a resort in the 1870s in Lake County, California.
Vichy Springs is a set of springs around which formed a resort in Mendocino County, California, United States. It is located on Sulphur Creek 3 miles (4.8 km) east-northeast of Ukiah, at an elevation of 801 feet.
Napa Soda Springs is a set of natural water springs that was the site of a resort in the 1880's in Napa County, California. It lies at an elevation of 705 feet. Napa Soda Springs is located 5 miles (8.0 km) east-southeast of Yountville.
Rector Reservoir is a reservoir in Napa Valley, California. It is located to the northeast of Yountville, and southwest of Lake Berryessa and supplies water to Yountville. The Silverado Trail leads to the reservoir passing it from north to south to the west of the lake and Rector Canyon. To the west is Silver Oak Cellars and Oakville.
Wheeler Springs is an unincorporated community that grew around a set of sulphurated hot springs in Ventura County, California. It is located 6 miles north of the Ojai Valley, within Los Padres National Forest. It is named for Wheeler Blumberg, who founded the town in 1891, and the many natural hot springs.
Allen Springs is a group of mineral water springs in Lake County, California. From 1874 the springs were surrounded by a resort with a hotel, cottages, saloon, store and so on. The resort was turned into a private club in 1912 and had been abandoned by 1940. By 2021 the site had returned to nature.
United States 
California 
