Five inland western Washington state parks worth hitting in March — all verified open, all with hookups, all within 3 hours of Seattle. No snow risk, no beach wind.
You've got a free weekend. Work has been relentless, the kids keep asking about that camping trip you mentioned back in the fall, and part of you is wondering whether March is actually worth it.
It is. The crowds are months away, reservations are easy to get, and western Washington's forests are at their most dramatic right now — green and moody and quiet in a way they aren't in July. The catch is that most camping advice either skips March entirely or sends you somewhere buried in snow or getting hammered by Pacific wind. These five parks don't have that problem.
All are inland, all are below 800 feet, all are confirmed open in March, and all have electric or full hookups so you can run heat at night. Every number in this guide comes straight from our verified campground database.
The easiest first RV trip a Seattle-area family can take. You're 12 miles south of Olympia off I-5 Exit 95, in genuine old-growth Douglas fir and western red cedar in under 80 minutes from the city. No ferry. No mountain pass. No drama.
The old-growth here is the real thing: trees estimated at 300 to 500 years old in a 842-acre forest — the largest intact lowland old-growth grove in the South Puget Sound region. Deep Lake sits at the heart of the park. In March the water is cold and clear, and the trout fishery is starting to pick up.
- Best for: First trips with kids. Short drive, big forest, real showers, beginner-friendly setup.
In March, you have Hood Canal almost to yourself. The summer crowds are gone, the kayak rental stands are closed, and the canal stretches north toward the Olympics with nobody on it. Belfair sits at the sheltered south end, where the wind barely registers and the water is shallower and warmer than anywhere else on the canal.
The tidal beach out front is the best thing here for kids. Low tides expose clam and oyster beds, and beachcombing along the Hood Canal shoreline keeps kids occupied for a solid morning.
- Best for: Families who want full hookups and real water access without Pacific coast wind.
Old-growth Douglas fir off I-5 between Chehalis and Centralia — this is one of the most underrated parks in Washington for RV travelers who don't think to look for cathedral-grade old-growth this close to the freeway. The trees here are genuinely old: 300-to-500-year-old firs that block out the sky and muffle road noise by the time you're 50 feet into the forest.
In March the park runs at maybe 20% capacity. Sites are well-separated. The forest floor is bright with sword fern even in rain. Electric hookups at every site mean you can run heat comfortably all night.
- Best for: RV travelers who want old-growth atmosphere with convenient I-5 access and full electric hookups.
A pedestrian tunnel under Highway 504 connects your campsite directly to the Mount St. Helens Visitor Center. Park the rig, walk through a tunnel, and be standing in front of the full story of the 1980 eruption — lava flow models, ash columns, film footage, and a view of the blast zone through the floor-to-ceiling windows.
In March the visitor center is open, the volcano is visible on clear days, and the campground has almost no competition. Fifteen full hookup sites and 18 water-and-electric sites; max 50 feet.
- Best for: Families who want a built-in educational destination alongside a comfortable hookup site.
The lake is a maar crater — an extinct volcanic explosion vent that filled with water after the blast. The result is a lake that's strikingly round, deep relative to its size, and clear year-round. The natural bowl shape blocks wind and creates a micro-climate that's noticeably warmer than the surrounding terrain.
Six electric hookup sites max 40 feet, plus a full set of amenities: showers, flush toilets, a boat launch, and 5 miles of lake trail that circles the crater rim. In March you'll likely have most of the trail to yourself.
- Best for: RV travelers who want an unusual, scenic, low-crowd site with easy access from the Portland/Vancouver metro.
The Bottom Line on March RV Camping in Western Washington
March camping in western Washington is not about tolerating the weather — it's about choosing terrain where the weather works in your favor. Rain in old-growth forest at Millersylvania or Lewis and Clark is atmospheric, not miserable.
All five parks on this list have hookups so you can run heat without burning propane all night. All are below 800 feet elevation so snow is not a factor. And all are within a 3-hour drive of Seattle, which means you can be set up and cooking dinner before dark on a Friday.
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