Colonial Creek South Campground sits along State Route 20 in Rockport, Washington, and the listing carries a rating of 4.6 from 293 reviews. That combination of a remote North Cascades address and a strong visitor score is what usually puts this campground on a trip-planning shortlist in the first place.
The reviews themselves focus on a narrow set of things: the lake, the restrooms, the size of the sites, and the wildlife. This review gathers what those visitors wrote and what the public listing records, so you can decide whether the place matches what you are looking for.

Colonial Creek South Campground at a Glance
Colonial Creek South Campground is listed under the single category of Campground, positioned along State Route 20 in Rockport, Washington, at roughly 48.69 degrees north and 121.10 degrees west, in the Pacific time zone. It sits in the kind of setting visitors keep returning to in their reviews, and its public listing points anyone planning a stay to the Recreation.gov page for reservations and details, with a phone line at +1 877-444-6777 for questions.
The listing also records practical attributes rather than descriptive ones: free on-site parking in the campground lot, a cash-only payment requirement, dogs allowed, and RV camping supported alongside a camping fee. Accessibility entries note a wheelchair-accessible car park, entrance and toilet. The listing gives no price range, no opening hours and no seasonal calendar, so anything time-related has to be checked with the official source before you load the car.
What Do Visitors Like About Colonial Creek South Campground?
Across the reviews, the tone is strongly positive but not uncritical. Visitors consistently praise the lake setting, the cleanliness of the facilities and the helpfulness of the rangers and staff. The most common reservations are practical rather than scenic: sites that sit close together, noise from neighbors, no showers, and a lake that is cold, deep and fast-moving. Several reviewers also point out that the campground is popular and busy, especially in good weather and on holiday weekends, and more than one recommends booking ahead.
1. Lake Views and Easy Water Access
The setting is what most reviewers lead with. Abdullah Shahmardan called it possibly one of the nicest campsites he has stayed at, pointing to the views, available drinking water and clean toilets. Daniel Robinson described a beautiful campground with a gorgeous lake, well-maintained trails and beach, and noted that kayak and paddleboard users should watch for wind that picks up quickly. Margot Parraghi said she and her group spent two nights there and found it easy to launch an inflatable boat and reach nearby hikes, while another reviewer wrote about stopping at the location for photographs of the lake and surrounding scenery even without camping overnight.
2. Clean Restrooms and Running Water
Restrooms come up repeatedly, and usually in a positive light. Francesc Vilariño Güell called the restroom top notch, with running water and flushing toilets. Sarah Hanchar described the facilities as well maintained and clean, listing flushing toilets as a bonus. Erin Morgan, who gave four stars, said everything was clean and well run and that a shower was the only thing missing. It is worth noting that the amenity listing mentions a public shower, so availability may vary by season or block, and this is best confirmed with the campground directly.
3. Crowds, Site Sizes and Booking Ahead
Site variety is a recurring theme. Francesc Vilariño Güell described plenty of spots that vary significantly in size, with some fitting only a single small tent and others accommodating a large tent plus a small one. Daniel Robinson and pacificnorthwestlandrover both advised checking the Recreation.gov listing in advance to be sure a chosen site matches your rig and needs, and Margot Parraghi noted the campground is aimed at smaller setups. Eva Boots said the sites are a little close together, adding that some neighbor noise is not an issue if you do not mind it.
Occupancy is another common thread. Alex Buchanan recommended booking early in the year, describing it as a very popular campground where people have been seen unable to find a spot without a reservation. Natalie Hoober wrote that it gets very busy on holiday weekends, with people walking through campsites. Anna arrived without reservations and relied on cancellations, moving between sites three times in a weekend, and noted that grabbing a cancelled site for the night carried no fee during that stay.
4. Wildlife Awareness and Food Storage
Bears feature in the reviews as a real consideration rather than a novelty. Anna asked visitors to keep food locked in a car or in the storage provided at each site, mentioning that bears come through the area. pacificnorthwestlandrover also noted that each site has lockable bear-proof bins for food. Jaime Turner described seeing a bear on a nearby trail as a highlight. Morgane wrote about a lot of wildlife and having breakfast surrounded by animals close to the lake entrances.
5. Water Safety and Cold Conditions
Several reviewers treat the lake as beautiful but demanding. Daniel Robinson warned that the water is very cold, gets deep quickly and has strong currents, and advised wearing a life jacket at all times. Bryan B camped in early August and doubted the water was even 50 degrees Fahrenheit, and also noted huge trees that keep the campground shaded and cool through summer. Catherine Hall and Alex Buchanan both wrote about family swimming and paddling, so the picture is one of an actively used lake that reviewers still describe as cold and fast.
6. Rangers, People and the General Atmosphere
Staff and fellow campers get consistent praise. Anna singled out rangers Wendy and Christine along with the person who opened the camp that day as awesome. Morgane described the guards as really nice and helpful, always ready to share information. Jaime Turner said everyone encountered was nice and respectful of the campground. Natalie Hoober and Catherine Hall both wrote that they love the place and keep coming back, with Catherine Hall noting her dogs love it there too. Sarah Hanchar, who camped in walk-in sites during three days of nonstop rain and had the place largely to herself, also flagged that there is zero cell service.
Visitor Highlights
Paraphrased summary of what visitors mention most — not direct quotes.
15 visitor mentions analyzed · 12 positive · 3 mixed
Reviewers describe stunning lake and mountain views from sites right on the water.
Guests repeatedly report clean restrooms with running water and flushing toilets.
Several visitors confirm drinking water is available at the campground.
Campers say sites sit close together, so some neighbor noise is possible.
A four-star reviewer noted showers appear to be the one facility missing.
Visitors praise the rangers and staff as friendly, helpful and informative.
Reviewers warn the lake is very cold, deepens fast and has strong currents.
Campers report bears in the area and advise locking food in provided storage.
The campground is described as very busy in good weather and on holiday weekends.
Site sizes vary widely, from room for one small tent to space for larger setups.
Reviewers say dogs are welcome and families find plenty of activities.
One long-time visitor reported zero cell service in the area.
Read original reviews on Google Maps →
Facilities and Amenities: What Should You Know?
On the practical side, the public listing places Colonial Creek South Campground on State Route 20 in Rockport, Washington, and describes it simply as a campground, with a free on-site parking lot on the grounds. Payment is recorded as cash only, which is worth planning for before you arrive. Dogs are allowed, and the listing supports RV camping alongside a camping fee, so both tent and rig-based stays appear to be part of the picture, even though reviewers describe the sites as better suited to smaller setups. Accessibility entries note a wheelchair-accessible car park, a wheelchair-accessible entrance and a wheelchair-accessible toilet.
Amenities recorded for the property include public toilets and restrooms, with a public shower also referenced in the amenity data, though one four-star reviewer said a shower was the one thing missing, so it is worth confirming what is open when you travel. Wi-Fi appears among the listed amenities, and a long-time visitor separately reported zero cell service in the area, which is a useful reminder that connectivity here should not be assumed. The campground is reachable through its Recreation.gov page for booking details, and the listed contact number is +1 877-444-6777. No opening hours, seasonal dates or price figures are provided in the source data, so those remain open questions to settle with the official listing.
Is Colonial Creek South Campground Worth Visiting?
For anyone drawn to lakeside camping in the North Cascades, the visitor record here supports a qualified yes. Reviewers repeatedly describe the setting as gorgeous, the restrooms as clean and well maintained, and the staff as helpful, and the listing supports dogs, RV camping, accessible facilities and free on-site parking. The trade-offs are equally well documented: sites sit close together, sizes vary widely, holiday weekends get busy, showers are described as absent, there is no cell service, and the lake is cold, deep and has strong currents. If you want a quiet, private, amenity-rich resort-style stay, this is likely not the fit. If you want a well-run base for lake days, paddling, photography and nearby trails, and you book ahead, it is worth considering.
Who it suits: campers who book early and choose their site carefully; families with kids who swim and paddle under supervision; paddlers and kayakers who watch the wind; RV and smaller-rig travellers who check site dimensions first; dog owners, since dogs are allowed; and photographers passing through on State Route 20. Who may want to look elsewhere: anyone needing showers, reliable cell service, guaranteed quiet, or a site that fits a large rig.
What Are the Potential Limitations?
The source data does not establish current opening dates, seasonal closures, nightly rates, reservation windows or real-time availability, and it gives no opening hours. Crowd levels are described by reviewers in general terms only, and busy periods may shift year to year. Road conditions on State Route 20 are mentioned in one review tied to a specific time, so current status must be checked separately. Amenity details such as shower availability appear inconsistent between the listing and visitor comments and are not confirmed here. Reviewer observations about wildlife, water temperature and currents reflect individual experiences rather than measurement. Nothing in the data confirms current staffing, maintenance standards or reservation policies.
Frequently Asked Questions
- Where is Colonial Creek South Campground located?
- It is listed on State Route 20 in Rockport, Washington, at approximately 48.69 degrees north and 121.10 degrees west, in the Pacific time zone.
- Can you make a reservation at Colonial Creek South Campground?
- The listing links to a Recreation.gov page for the campground, and reviewers strongly recommend booking early because it is popular. One visitor also described arriving without a reservation in September, when the campground was first come, first served, and picking up a cancelled site at no fee for the night.
- Are dogs allowed at Colonial Creek South Campground?
- Yes. Dogs are listed as allowed, and reviewers describe it as a dog-friendly place, with one noting that her dogs love it there.
- What facilities are available at Colonial Creek South Campground?
- The listing records public toilets and restrooms, free on-site parking, a camping fee, RV camping, and accessible car park, entrance and toilet facilities. A public shower also appears in the amenity data, though one reviewer said showers were the only thing missing, so it is worth confirming before your trip.
- Is the lake safe for swimming and paddling?
- Reviewers describe Diablo Lake as extremely cold, deepening quickly and having strong currents, and one advised wearing a life jacket at all times. Another noted that wind picks up fast, which matters for kayak and paddleboard users.
Final Verdict
Colonial Creek South Campground earns its 4.6 rating and 293 reviews on the strength of its lakeside setting, clean and well-maintained restrooms, and helpful staff, all confirmed by repeat visitors. The same reviews are clear about the trade-offs: closely spaced sites of widely varying size, busy weekends, no showers, no cell service, and cold, powerful water. Come with the right expectations, book ahead where the Recreation.gov listing allows it, and confirm current conditions, fees and facility availability with the official source before you go.
This review was compiled from information gathered from various public sources and visitor reviews, then organized into general informational content. Details such as fees, opening periods, facilities and conditions may change over time and should be verified with the official source before you travel.