Prosser Historical Museum
Two centuries of Prosser and lower Yakima Valley history.
Tuesday, October 6, 2026 · Benton & Franklin counties
Two centuries of Prosser and lower Yakima Valley history.
Exhibits on Sacagawea, the Lewis and Clark expedition and the tribes of the confluence, inside Sacajawea Historical State Park.
Nonprofit art gallery in Howard Amon Park with rotating shows, a juried exhibition and classes for adults and kids.
Richland’s riverfront park beside the Uptown district: shaded lawns, the riverside path, a playground and the summer concert and art-fair home base.
North Richland riverfront park with sports fields and access to the riverside trail.
The Tri-Cities’ favorite hike: the Canyon Trail climbs to summit views over all three cities and the rivers. Trailheads at Trailhead Park (Queensgate Dr) and Westgate (Langdon/Skyline trails). No shade, so go early in summer.
State park at the confluence of the Snake and Columbia rivers where the Lewis and Clark expedition camped in 1805, with an interpretive center, picnic lawns and river access. Discover Pass required.
West Pasco riverfront park on the Columbia with picnic areas and a section of the Sacagawea Heritage Trail.
Port of Kennewick island with a marina, a riverside walkway, the lighthouse viewpoint, public art and waterfront dining.
The region’s signature riverfront park: miles of Columbia River shoreline, the Sacagawea Heritage Trail, a family fishing pond, playgrounds, boat launches and a bandshell for festivals.