Colonial Creek Campground Boat Ramp provides direct water access to Diablo Lake with a small gravel beach, boat ramp, and dock suitable for launching kayaks, paddleboards, and small motorized boats.

Free day-use parking is available, and the ramp is located within the campground near amenities including restrooms, drinking water, and picnic facilities.

Note that the boat launch may experience shallow water due to silt accumulation, and paddlers should be aware of afternoon wind conditions on the lake.