Lewis and Clark Trail State Park - United States
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About Lewis and Clark Trail State Park
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Best time to visit Lewis and Clark Trail State Park
Late spring through early fall, roughly May to September, is the best window for RV travel, with warm days, dry roads over the Blue Mountains, and the fullest range of open facilities. Summer brings hot afternoons in the Walla Walla Valley but cool evenings under the old-growth canopy along the Touchet River. Shoulder seasons in April and October offer quieter campsites and fall color, though overnight freezes are possible. Winter visits are limited, as the campground typically closes for the off-season and only day-use access remains, with potential snow on approach roads.
Campground closed for the off-season; day-use only.
Campground closed for the off-season; day-use only.
Campground typically closed early in the month; variable shoulder weather.
Campground opens for the season; overnight frosts still possible.
Pleasant camping weather begins.
Warm, dry, and a popular time to visit.
Hot afternoons; peak season, reserve early.
Hot and dry; watch for regional wildfire smoke.
Cooler nights, fewer crowds.
Fall color along the Touchet River; campground typically closes late in the month.
Campground closed for the off-season; day-use only.
Campground closed for the off-season; day-use only.
Things to do at Lewis and Clark Trail State Park
- Walk the Old-Growth Forest Trails EasyRV parking available
Short interpretive walking paths wind through one of eastern Washington's rare old-growth stands of Ponderosa pine and cottonwood along the Touchet River. The flat, shaded loops are suitable for most visitors and make an easy leg-stretcher from the campground. nps.gov/articles/forgotten-trail.htm
- Touchet River Access EasyRV parking available
The park fronts the Touchet River, offering quiet riverside picnic spots and wading access during summer low flows. The river corridor is a cool refuge on hot valley afternoons.
- Patit Creek Campsite Sculptures EasyRV parking available
A short drive from the park near Dayton, this roadside installation features more than 80 life-size steel sculptures representing the Corps of Discovery's May 1806 encampment. It is a quick, free stop with pull-off parking suitable for RVs. nps.gov/articles/forgotten-trail.htm
- Historic Dayton Walking Tour
The town of Dayton, about 5 miles east of the park, preserves one of Washington's oldest train depots and a large collection of historic homes and storefronts. It makes an easy half-day outing paired with local dining.
- Blue Mountains Scenic Drive
US Highway 12 east of Dayton climbs into the Umatilla National Forest and the Blue Mountains, offering scenic overlooks and access to forest roads. RVers should plan fuel stops in Dayton and watch for steep grades.
- Lewis and Clark National Historic Trail Auto Tour
The park is a stop along the Lewis and Clark National Historic Trail, which commemorates the 1803-1806 expedition route. Visitors can follow interpretive auto tour signage through the region to connect expedition sites. nps.gov/lecl/
- Walla Walla Valley Wine Country
About 25 miles southwest, the Walla Walla Valley is one of the Pacific Northwest's premier wine regions with dozens of tasting rooms. Many wineries have ample parking and make a popular day trip from the campground.
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RV Rentals Lewis and Clark Trail State Park
Lewis and Clark Trail State Park, WA, United States
How to get to Lewis and Clark Trail State Park
The park sits along US Highway 12 about 5 miles west of Dayton and roughly 25 miles northeast of Walla Walla, a drive of about 30 to 40 minutes. From the Tri-Cities (Kennewick, Pasco, Richland) it is about 60 miles, roughly 1 hour 15 minutes via US-12 East. RVers arriving from the east should note the Blue Mountains grades on US-12 between Lewiston, Idaho and Dayton, including the climb over Alpowa Summit and winding sections with reduced-speed curves. The closest regional airport for fly-and-rent travelers is Walla Walla Regional Airport (ALW), with larger service at Tri-Cities Airport (PSC) about 70 miles west.
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