Northwest of Spokane, the 600 acre Riverside State Park ORV Area is open to dirt bike riding. There is a 30+ mile maze of trails and open dirt biking.
To reach Riverside from Spokane on US90, use Exit 280. Cross the Maple Street bridge and then turn left on Northwest Blvd. Stay on this road until Francis Ave. (Hwy 291) take a left. When the road bends north, it becomes Nine Mile Rd. Take a left on Seven Mile Rd. and follow the signs to the ORV area (approximately two miles).
Note: OHV riding is only permitted within the OHV area. It is not permitted within the rest of the state park.
Overall, Riverside State Park ORV Area is the 22nd most popular dirt bike trail of all 38 dirt biking rides in Washington.