Cobb Mountain is the tallest mountain in the Mayacamas Mountains of California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

. Its 4720+ feet, (1439+ m) main summit is located in Lake County

Lake County, California

Lake County is a county located in the north central portion of the U.S. state of California, north of the San Francisco Bay Area. It takes its name from Clear Lake, the dominant geographic feature in the county and the largest natural lake wholly within California...

, west of the town of Cobb

Cobb, California

Cobb is a census-designated place in Lake County, California, United States. Cobb is located northwest of Whispering Pines, at an elevation of 2631 feet...

. Like nearby Mount Saint Helena

Mount Saint Helena

Mount Saint Helena is a peak in the Mayacamas Mountains with flanks in Napa, Sonoma, and Lake counties of California. Composed of uplifted 2.4-million-year-old volcanic rocks from the Clear Lake Volcanic Field, it is one of the few mountains in the San Francisco Bay Area to receive any snowfall...

, Cobb Mountain is tall enough to receive winter snowfall.
The mountain also has a sub-peak named Cobb Mountain – Southwest Peak with an elevation of about 4480+ feet, (1366+ m);
Southwest Peak lies on the Sonoma

Sonoma County, California

Sonoma County, located on the northern coast of the U.S. state of California, is the largest and northernmost of the nine San Francisco Bay Area counties. Its population at the 2010 census was 483,878. Its largest city and county seat is Santa Rosa....

-Lake county line and is the highest point in Sonoma County. Nearby tall peaks like Mount Saint Helena and Snow Mountain

Snow Mountain (Colusa County, California)

Snow Mountain is a mountain in Northern California in the Snow Mountain Wilderness of Mendocino National Forest. The highest point on the mountain, known as Snow Mountain East, is the highest point in both Colusa and Lake counties...

 can be seen from this summit.

The east end of Cobb Mountain drains into the headwaters of Putah Creek

Putah Creek

Putah Creek is a major stream in Northern California, a tributary of the Yolo Bypass. The creek has its headwaters in the Mayacamas Mountains, a part of the Coast Range...

, then into the Sacramento River

Sacramento River

The Sacramento River is an important watercourse of Northern and Central California in the United States. The largest river in California, it rises on the eastern slopes of the Klamath Mountains, and after a journey south of over , empties into Suisun Bay, an arm of the San Francisco Bay, and...

, the San Francisco Bay

San Francisco Bay

San Francisco Bay is a shallow, productive estuary through which water draining from approximately forty percent of California, flowing in the Sacramento and San Joaquin rivers from the Sierra Nevada mountains, enters the Pacific Ocean...

, and the Pacific Ocean

Pacific Ocean

The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

.
The south slopes of Cobb Mountain drain into Anderson Creek, and thence into Putah Creek.
The southwest slopes of Cobb Mountain drain into Cobb Creek, thence into Big Sulphur Creek

Big Sulphur Creek

Big Sulphur Creek is a westward-flowing stream in northern Sonoma County, California, U.S.A. which springs from The Geysers in the Mayacamas Mountains and runs to empty into the Russian River.-Course:...

, the Russian River

Russian River (California)

The Russian River, a southward-flowing river, drains of Sonoma and Mendocino counties in Northern California. With an annual average discharge of approximately , it is the second largest river flowing through the nine county Greater San Francisco Bay Area with a mainstem 110 miles ...

, and into the Pacific.
The northwest slopes of Cobb Mountain drain into Alder Creek, thence into Kelsey Creek, Clear Lake, Cache Creek

Cache Creek (Yolo County, California)

Cache Creek is an stream in Lake County, California, Colusa County, California and Yolo County, California. The South Fork begins at Clear Lake in Lake County, roughly parallels State Route 20, and turns south at the junction with State Route 16 in Colusa County...

, and the Sacramento River.
The northeast slopes of Cobb Mountain drain into Kelsey Creek.

History

The mountain is named after John Cobb

John Cobb

John Cobb may refer to:People* John Cobb , Australian politician* John Cobb , English cabinetmaker* John Cobb , Canadian politician)...

, the first pioneer to settle in the area. Cobb was born in Henry County, Kentucky

Henry County, Kentucky

As of the census of 2000, there were 15,060 people, 5,844 households, and 4,330 families residing in the county. The population density was . There were 6,381 housing units at an average density of...

 on May 19, 1814. In 1853 he arrived in California and homesteaded in Cobb Valley and went on to become the county assessor and the road overseer for the Clearlake District in 1855. He built a combined saw and gristmill in 1859, which was later destroyed by fire. He sold his interests and moved to Napa County around 1860.