Washington State Park sits along the Big River in Washington County, Missouri, spanning over 2,100 acres of rugged Ozark terrain. What sets this park apart is its remarkable collection of ancient petroglyphs — rock carvings left by Native Americans over 1,000 years ago. The petroglyphs, found along exposed dolomite glades, make Washington one of the most archaeologically significant state parks in Missouri.

Beyond the petroglyphs, the park offers a landscape shaped by the Civilian Conservation Corps during the 1930s. The CCC-built stone structures — including a lodge, shelter houses, and the iconic stone swimming pool — are themselves worth the visit, blending seamlessly into the surrounding bluffs and hardwood forest.

Hikers can explore over 15 miles of trails ranging from easy riverside walks to challenging ridge routes. The 1,000 Steps Trail climbs through cedar glades with panoramic views of the Big River valley, while the Rockywood Trail winds through dense forest and past exposed rock formations. Swimming, fishing, and canoeing on the Big River round out the warm-weather activities.

Camping details should be confirmed directly with the park, as site availability and amenities vary seasonally.

Spring and fall are the best times to visit — wildflowers blanket the glades in April and May, while October brings stunning foliage along the river bluffs. Summer draws swimmers and paddlers but expect heat and humidity. Winter offers quiet trails and crisp views through bare canopy.

Washington State Park rewards visitors who appreciate both natural beauty and deep human history in one place.

Explore Nearby

• Mark Twain National Forest — National Forest in Missouri
• Mary’s River Covered Bridge — Covered Bridge in Illinois
• Meeting of the Great Rivers Scenic Route — Scenic Byway in Illinois
• Shawnee National Forest — National Forest in Illinois
• Gillespie Lake — Public Land in Alaska