Details
Colonial Creek Campground, Sedro-Woolley, WA, 98284
Lat:48.687
Lng:-121.094
Content provided by
National Park ServiceLast Updated: October 13, 2026
Campground
Colonial Creek South Campground
National Park ServiceCampground
Colonial Creek Campground, Sedro-Woolley, WA, 98284
National Park ServiceLast Updated: October 13, 2026
Colonial Creek South Campground is a remote, yet busy campground nestled in old growth forest on the south side of State Route 20 near mile marker 130.Ten walk-in, tent-only sites are available first-come, first-served in the winter (sites 64-73). Sites may be difficult to access in winter. Reservations required late May to September. Recreational opportunities include a fully accessible fishing pier and boat launch on Diablo Lake, as well as hiking opportunities on Thunder Creek and Thunder Knob trails.
Most of the campground is open seasonally with reservations, usually late May to mid-September. Colonial Campground South campsites 64-73 are open during winter months with no water, services, or fees. Vault toilets available. Snow may be on the ground during winter months and sites may be difficult to access.
The best weather for visiting the North Cascades generally occurs between mid-June and late September. Summer daytime temperatures average in the 70s F. Snow is off most trails by mid-July. Autumn and Spring are popular for color and wildlife. Storms are common: always be prepared for a few days of rain and wind. The east side of the Cascade Mountains (Lake Chelan National Recreation Area) is drier and warmer in the summer than the west side. Summer temperatures at Stehekin reach the 90s F.
Trash & Recycling Collection
Toilets
Amphitheater
Dump Station
Staff or Host On-Site
Potable Water
Food Storage Lockers
Located off of SR 20 at mile post 130. Twenty miles (40 km) east of Marblemount, 63 miles (101 km) west of Winthrop.
Colonial Creek Campground Summer Reservation Fee
Reservations can be made up to 6 months or 7 days in advance at www.recreation.gov or by phone at (877) 444-6777. Check out time is 12:00 pm on the day of departure.
Colonial Creek South Campground Fall First-Come, First-Served Fee
Fee is per site per night; fees are paid through pay.gov at tinyurl.com/NOCACamping. Campsite occupancy limits include a maximum of 2 vehicles, 8 people, and 3 tents. Check out time is 12 pm on day of departure. Campsites are first-come, first-served once reservations end the first week of September until October when potable water and trash services are provided.
Colonial Creek South Campground Winter Fee
Ten sites #64 - #73 (walk-in, tent-only) remain open during winter season from October to late May with no water, services, or fees. Vault toilets are available. Please carry out all trash. Snow may be on ground during winter months.
Wheelchair Access
There are three wheelchair accessible sites available in Colonial Creek North and South Campgrounds.
RV Allowed
Yes
RV Information
This campground is not large RV friendly. Large RVs can better be accommodated in Newhalem Creek Campground sites.
RV Maximum Length
36
Trailer Maximum Length
36
ADA Information
There are three ADA accessible sites available in Colonial Creek North and South Campgrounds.
Trailer Allowed
Yes
Access Roads
Paved Roads - All vehicles OK
Classifications
Developed Campground
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