Recreation at Lake Natoma is managed by the California Department of Parks and Recreation under agreement with the Bureau of Reclamation. The Lake was created by Nimbus Dam across the American River. Lake Natoma is a regulating reservoir for releases from Folsom Lake. The Dam and Lake are features of the Central Valley project. Usually open 7 days per week, summer hours (April 1-October 15) are 6:00 a.m. to 9:00 p.m. Winter hours (October 16 - March 30) are 7:00 a.m. to 7:00 p.m. Facilities include one group campground, 11 miles of paved bicycle trails, 6 miles of multi-use trails and excellent year-round bank or boat fishing. Two launch ramps provide continuous boat launching access year-round, in addition to one car-top boat launch area. Lake Natoma is an excellent facility for non-motorized boat recreation. Motorized boating is also allowed and there is a 5 mph speed limit on the entire lake. Good fishing for both cold and warm water species including rainbow trout, brown trout, black bass, crappie and bluegill.