Colonial Creek South Campground

North Cascades National Park

Colonial Creek South Campground in North Cascades National Park is a remote, yet bustling campground nestled in old -growth forest. Located on the south side of State Route 20 near milepost 130, there are 94 campsites that are surrounded by forest and located on Diablo Lake. 

Colonial Creek South Campground can accommodate a variety of camping, whether it’s drive-in camping, or walk-in tent camping. The campsites vary in size from small to medium. Most of the campsites do not accommodate large trailers or RVs.  

The campground is located on the southern side of State Route 20, with some campsites along the lakefront of Diablo Lake. The entire facility offers drinking water, flush toilets, garbage and recycling, RV dump station, and some paved parking spaces, but most sites have uneven gravel parking. Each campsite offers a picnic table, bear box, and campfire ring.

Need to Know

Natural Features

Colonial Creek South Campground is surrounded by a forest of western redcedar, western hemlock, Douglas-fir, red huckleberries, and other native vegetation. The campground has easy access to Diablo Lake for recreating.  

Nearby Attractions

Traveling west on State Route 20:  

The North Cascades Visitor Center is 11 miles (18 km) west on State Route 20 from Colonial Creek South Campground, operating seasonally, typically from May to September. Campers can find the passport stamps, exhibits, park film, park store, and much more.   

Traveling east on State Route 20:  

Diablo Lake Overlook is 1.5 miles (2 km) east on State Route 20. the turquoise lake can be viewed safely from this area and there is ample day use parking and vault toilets. 

Ross Lake Overlook is 5 miles (8 km) east on State Route 20, this is a less developed vista point. There are two pull off areas with interpretive way sides and with views of the Ross Dam and Ross Lake.


Campers can access the Thunder Creek Trailhead from the South Loop. The Thunder Knob Trailhead is on the north loop across State Route 20.  

Fishing is allowed in Diablo Lake with a Washington State Fishing license, the nearest location to purchase a license is in the town of Marblemount, WA. Follow Washington State Fishing Regulations when recreating. 

Black bears are active in this campground and the surrounding trails. Be aware of your surroundings while hiking, picnicking, and camping. Use the provided bear boxes in your campsite to store coolers, cookware, and other odorants when not in use. If you encounter a bear around the campground or on a trail, inform campground staff or go to the North Cascades Visitor Center and fill out a bear report. 

Contact Information


810 State Route 20 Sedro-woolley WA 98284

Phone Number

For campground inquiries, please call: 360-854-7200

Rental Options

Learn more about gear rental options for your trip

Driving Directions

Colonial Creek South Campground is located near milepost 130 on State Route 20. From Burlington, WA, drive 70 miles (113 km) east on State Route 20. From Twisp, WA, drive 71 miles (114 km) west on State Route 20.

Available Campsites

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