Overview

Colonial Creek South Campground requires reservations during the peak season, from late May through early September of each year.  

Important changes to booking windows: To better serve visitors, Colonial Creek South Campground will release campsites in two staggered block releases. These block releases will be 6 months in advance and 7 days in advance. 

• Campsites #64 - #95 and #116 - #164 are available for reservations 6 months in advance.
• Campsites #96 - #113 are available for reservations 7 days in advance.

Any sites not reserved during the peak season are available same-day as first-come, first-served for 1 night only and can only be claimed in person at the campground. 

Colonial Creek South Campground may be open as first-come, first-served after the peak season until most of the campground closes for the year, typically in mid to late September.  

Ten walk-in, tent-only campsites (#64 - #73) are open as first-come, first-served before and after the peak season, from January through late May, and early September through December of each year. 

The campground is remote, yet bustling and is nestled in old-growth forest. Located on the south side of State Route 20 near milepost 130, there are 93 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.  

Recreation

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. 

Facilities

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.

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.  

Contact Info

For facility specific information, please call (360) 854-7200.

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