The largest lake on the Forest has 2,280 acres of surface area and 31 miles of shoreline. Please remember that camping in Lake Pillsbury basin is allowed only in designated campgrounds. The campgrounds at Lake Pillsbury are operated and maintained by Pacific Gas and Electric. More information on Pacific Gas & Electric campgrounds is available by calling 916-386-5164. All of the campgrounds at Lake Pillsbury are open from May to September, except Oak Flat which is open all year. Lake Pillsbury campsites are designated for up to 2 vehicles each (there is a fee for additional vehicles) and a maximum of 6 people. The vault toilets are a modern no-odor type. Camping is on a first-come, first-served basis, with no reservations required except for the Fuller Grove Group Campground.