Spokane River Centennial State Park Trail, National Recreation Trail in eastern Washington, US.

The Spokane River Centennial Trail is a 39-mile (63 km) paved route managed by Washington State Parks as Centennial Trail State Park. It runs from Nine Mile Boat Launch in Nine Mile Falls to the Washington–Idaho border, passing through Spokane, Spokane Valley, Liberty Lake and Spokane Bridge. It is divided into Riverside, Urban and Valley sections.

The route was constructed between 1989 and 1991 as a project celebrating Washington State's centennial anniversary. This development created the first continuous connection across multiple jurisdictions in the region.

The trail's three sections carry local names: Riverside inside Riverside State Park, Urban within Spokane, and Valley east of the city, mostly in Spokane Valley. Near the Idaho line it passes under the Interstate 90 Spokane River Bridge and runs about 250 feet through Kootenai County before meeting the North Idaho Centennial Trail.

Access is free at most entry points such as Maringo, Islands, and Barker, while only specific areas within Riverside State Park require a pass. Visitors should check which access point matches their plans before arrival to avoid surprises.

For about 250 feet the trail dips into Kootenai County, Idaho, then re-enters Washington for roughly 2,000 feet before meeting the North Idaho Centennial Trail at the state line. This brief Idaho passage is easy to miss while riding.