Colonial Creek South Campground
North Cascades National Park · Washington · 90 sites
Photos: National Park Service via Recreation.gov
Overview
Colonial Creek South Campground is a National Park Service campground in North Cascades National Park, Washington, with 90 sites. Very shady: nearly every site is under trees. No carrier reports coverage at any site.
90 of 90 sites shaded
0 of 90 sites in full sun
1 of 90 sites with clear sky
Map of the campground
Every site from the Recreation.gov listing. Choose a layer to see it across the campground; tap a site to open it in Roam.
Layers
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Questions
Which sites at Colonial Creek South Campground are the shadiest?
Nearly all of them. All 90 sites at Colonial Creek South Campground have good shade from the trees, including from the hot afternoon sun.
See the tree canopy in RoamWhich sites at Colonial Creek South Campground get the most sun?
None are truly sunny; the sunniest still have trees over most of the site.
See the tree canopy in RoamWill Starlink work at Colonial Creek South Campground?
Only at a few. About 1 of 90 sites have a clear gap in the trees for Starlink and 2 a partial one; most sit under tall trees. Satellite texting on a phone needs less open sky, but still works best from the most open spot you can find. This is our estimate from tree heights — check with the Starlink app's obstruction check when you arrive.
See the tree canopy in RoamWhich sites at Colonial Creek South Campground are the most level?
1 of 90 sites is flat, and 6 more have a gentle slope most RVs can level with blocks; 83 are steeper, better for tents. Sites that take RVs or trailers fit rigs up to 43 ft.
See the slope at each site in RoamDoes Colonial Creek South Campground have cell service?
Not really. None of T-Mobile, Verizon or AT&T reports coverage at any site at Colonial Creek South Campground, so plan to be offline here. That's the coverage each carrier reports to the FCC, not a measured signal, so under trees or below a ridge it can be weaker.
See the coverage map in RoamWhat’s the weather like at Colonial Creek South Campground in October?
In October, expect highs around 53°F and lows around 38°F, with about 7.6 inches of rain over the month. Every month’s averages are in Roam Premium.
Open Colonial Creek South in RoamCampground facts
- Sites
- 90
- Kinds
- 48 for RVs or trailers · 42 tent-only
- Hookups
- None
- Longest rig
- 43 ft
- Accessible
- 3 sites
- Elevation
- 1,209–1,342 ft
- Amenities
- Food storage lockers
- Every site
- Pets allowed · Campfires allowed · Check-in 2 PM, check-out 12 PM
- Managed by
- National Park Service
- Booking
- Reserve on Recreation.gov
How we know Sources and limits
Shade, sun and Starlink are our estimates from Meta and the World Resources Institute’s canopy-height model (about 2 m pixels, from satellite imagery calibrated with space lidar; CC BY 4.0). From 2 m above each site we trace 72 lines out to 60 m and note the tallest tree in each direction. Shade counts trees overhead, the canopy within 30 m and how much of the afternoon sky is blocked. Sun counts how open the southern sky is. Starlink needs open sky above 35°, with the northern half counted twice because US dishes tilt north, and we keep the best spot within 8 m of the site’s post. The model sees tree heights only, not trunks, buildings or hills, so check with the Starlink app when you arrive.
Slope is the ground at each site’s post over about 4 m, from USGS 3DEP 1 m lidar: level under 2%, gentle to 4% (most rigs level on blocks), sloped to 8% (fine for a tent), steep beyond.
Cell coverage is from the FCC Broadband Data Collection (carrier filings as downloaded May 2026): each site is tested against each carrier’s modelled outdoor 4G/5G coverage. It is what the carriers report, not a measured signal.
Weather is NOAA’s 1991–2020 climate normals for the campground. Sites and facts are from Recreation.gov’s open data (July 2026). Map imagery: USGS The National Map. Photos: Recreation.gov.
From the campground’s Recreation.gov listing: “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. 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.”
Page data as of October 15, 2026. Full source notes are in each layer’s info in the app.