This facility lies at 1,200 feet along the North Cascades Highway near mile marker 130. It consists of 162 sites available on a first come, first served basis from May through October. The Colonial Creek Campground lies on the western shoreline of the Thunder Arm of Diablo Lake. It provides access to fishing, boating, hiking, backpacking and ranger-led programs.

The Colonial Creek Campground consists of two unpaved camping loops with mostly back-in sites. Two campsites are accessible to individuals using wheelchairs. Campground amenities include drinking water, picnic tables, a boat ramp, flush toilets, garbage collection and a dump station.

North Cascades National Park, 700 Rayovac Drive, Suite 100 , Sedro-Woolley, WA, 98284-9314, Phone: 608-264-5610