State Route 215 (SR 215) is a 6.24-mile long (10.04 km) state highway serving Okanogan County in the U.S. state of Washington. The highway travels northeast parallel to the Okanogan River from SR 20 in Okanogan to SR 155 Spur in Downtown Omak. SR 215 turns east to end at an intersection with SR 20 and U.S. Route 97 (US 97) in North Omak. The highway was previously part of State Road 10 and Primary State Highway 10 (PSH 10), concurrent with US 97, until a bypass of Omak was built in the 1960s. SR 20 was routed onto the highway after the 1964 highway renumbering, but was moved to the bypass and replaced by SR 215 in 1973.

State Route 20 (SR 20), also known as the North Cascades Highway, is a state highway that traverses the U.S. state of Washington. It is the state's longest highway, traveling 436 miles (702 km) across the northern areas of Washington, from U.S. Route 101 (US 101) at Discovery Bay on the Olympic Peninsula to US 2 near the Idaho state border in Newport. The highway travels across Whidbey Island, North Cascades National Park, the Okanagan Highland, the Kettle River Range, and the Selkirk Mountains. SR 20 connects several major north–south state highways, including Interstate 5 (I-5) in Burlington, US 97 through the Okanogan–Omak area, SR 21 in Republic, and US 395 from Kettle Falls to Colville.