Peninsula Boat Ramp provides access to Rimrock Lake on the north shore just above the dam, located on a scenic peninsula in the Okanogan-Wenatchee National Forest.

Day use costs $8/vehicle, and the ramp accommodates both motorized and non-motorized boating, though windy conditions and debris can make launching difficult.

Note that a recent washout has condensed the loop road to a turnaround, and potable water is not available at this site.