Hat Rock State Park, State park in eastern Oregon, United States.
Hat Rock State Park is a state park in eastern Oregon built around a basalt rock formation that rises above the Columbia River near Lake Wallula. The park includes boat ramps, fishing spots, a picnic area, and a small spring-fed pond alongside the main rock.
Lewis and Clark noted the rock formation during their 1805 expedition and used it as a reference point along the Columbia River. Long before their arrival, the site had been a gathering place for indigenous peoples of the region.
The park's name comes directly from the shape of the basalt rock, which looks like a hat when seen from the river. Today, visitors use the area for fishing, picnicking, and swimming in the small pond near the main picnic grounds.
The park is open year-round and works well for a short stop or a longer outing with a boat or fishing gear. Boat ramps, picnic areas, and restrooms are clearly marked and easy to find once inside the park.
The small pond inside the park is entirely cut off from the Columbia River and fed only by underground springs. It holds its own population of rainbow trout that developed separately from the fish in the nearby river.
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