Details
Colonial Creek Campground, Sedro-Woolley, WA, 98284
National Park ServiceLast Updated: January 7, 2026
Table Of Contents
Campground Overview
Introduction
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.
Campsite Details
Operating Hours
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.
Weather
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.
Amenities
Trash & Recycling Collection
Toilets
Amphitheater
Dump Station
Staff or Host On-Site
Potable Water
Food Storage Lockers
Directions
Located off of SR 20 at mile post 130. Twenty miles (40 km) east of Marblemount, 63 miles (101 km) west of Winthrop.
Rates & Fees
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.
Rules & Regulations
Fire/Stove Policy
Gathering firewood is prohibited. Firewood is available outside the park.Regulations Overview
Campsites are considered occupied only when fee has been paid. Payment must be paid within 24 hours of leaving the campsite or reaching cell service. Sites may not be reserved for others. Maximum of two vehicles, eight people and three tents per site. Vehicles and tents must not be placed on or impact vegetation. Check-in time is 2 pm on day of arrival. Checkout time is 12 pm on day of departure. Quiet hours are from 10 pm to 6 am. Generator hours are from 8 am to 8 pm. Camping is limited to no more than 14 days from July 1 to September 1 and no more than 30 days in a calendar year. Do not feed or tease wildlife - keep your food and other appealing items in your vehicle or bear box at all times except when eating or using them. Pets must be on a leash no longer than 6 feet or confined at all times. Fires are only permitted in designated fire grates and must be attended at all times. Firewood collecting is prohibited; please purchase firewood from a local vendor.Accessibility
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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