Cobb Mountain reaches 4,720 feet into the sky in Cobb, California. It is the tallest summit in the Mayacamas Mountains. It is listed with a location in Lake County. It receives quite a bit of snowfall throughout the year to make it a good place for skiing. At the summit one can see Southwest Peak and Mount Saint Helena, along with Snow Mountain. These are some of the higher peaks around the area.
The east end of Cobb is where water drains from winter melts. It goes into Putah Creek which flows into Sacramento River before landing in San Francisco Bay and the Pacific Ocean. The south slope also has some drainage towards Anderson Creek, which then goes into Putah Creek.
Other rain runoff goes into Sulphur Creek then Russian River and into the Pacific. From the north Alder Creek gains the runoff before it goes to Kelsey Creek, Clear Lake, into Cache Creek and Sacramento River.
The mountain was named after John Cobb who was the first to settle in the area in 1853. He became county assessor and overseer for the roads of Clear Lake District. He also formed a saw and gristmill in 1859, though it was burned in a fire.