SR 215 begins as 2nd Avenue in Okanogan at an intersection with SR 20, which turns southeast to cross the Okanogan River. 2nd Avenue crosses over Salmon Creek before it empties into the Okanogan River at Alma Park. The highway continues northeast and passes the Okanogan Community Library before leaving Okanogan for Omak, becoming Elmway.[1] SR 215 passes the Omak Memorial Cemetery and Mid-Valley Hospital before becoming Okoma Drive and entering Downtown Omak.[1] The roadway turns east onto 4th Avenue and back north onto Main Street, passing the local post office, before intersecting Omak Avenue, signed as SR 155 Spur.[1] Main Street continues north and passes the Omak campus of Wenatchee Valley College,[3] before turning east onto Riverside Drive and ending at an intersection with SR 20 and US 97.[1][4]
Every year the Washington State Department of Transportation (WSDOT) conducts a series of surveys on its highways in the state to measure traffic volume. This is expressed in terms of annual average daily traffic (AADT), which is a measure of traffic volume for any average day of the year. In 2011, WSDOT calculated that between 4,200 and 13,000 vehicles per day used the highway, mostly in Downtown Omak.[5]
^Washington State Legislature (January 26, 1905). "Chapter 7: Providing for the Establishment and Repair of Certain State Highways". Session Laws of the State of Washington (1905 ed.). Olympia, Washington: Washington State Legislature. p. 22. Retrieved January 21, 2013.
^Washington State Legislature (1919). Session Laws of the State of Washington (1919 ed.). Olympia, Washington: Washington State Legislature. Retrieved January 21, 2013.
^Washington State Legislature (March 17, 1937). "Chapter 190: Establishment of Primary State Highways". Session Laws of the State of Washington (1937 ed.). Olympia, Washington: Washington State Legislature. p. 939. Retrieved January 21, 2013.
^Washington State Legislature (1967). "Chapter 145". Session Laws of the State of Washington (1967 ed.). Olympia, Washington: Washington State Legislature.
^ abcOkanogan, 1963(JPG) (Map). 1:250,000. United States Geological Survey. 1963. Retrieved January 21, 2013.
^Prahl, C. G. (December 1, 1965). "Identification of State Highways"(PDF). Washington State Highway Commission, Department of Highways. Retrieved January 21, 2013.