Visitor information and guide to Lake Berryessa boat rentals, houseboats, jet ski, boat tours, water sports, and watercraft rentals.  This is the largest lake in Napa County, California.  Most visitors enjoy swimming, water skiing, camping, fishing, hiking, boating, and sightseeing.

Website information about Lake Berryessa was an agricultural region before it was formed, whose soils were considered among the finest in the country.  The main town in the valley, Monticello, was abandoned in order to construct the reservoir.  Construction of Monticello Dam was begun in 1953, and the reservoir filled by 1963, creating what at the time was the second-largest reservoir in California.  With Lake Shasta being the largest..

The lake is heavily used for recreational purposes and houseboating vacation rentals to the surrounding counties, but we also see people that come from around the world, and enjoy over 5,000 surface acres when full.  The reservoir is approximately 15.5 miles long, but only 3 miles wide.  The lake has approximately 165 miles of shoreline to enjoy.