MP: .06 Location: Firing Center Rd and I-82, Selah SR 821 begins at I-82 just northeast of Selah MP: .17 Location: SR 821 and Harrison Rd, Selah Junction SR 823 coming up immediately after the freeway. SR 823 serves functionally as a business route through Selah encompassing an older alignment of US-97. SR 821 will … Continue reading State Route 821, I-82/US-97 to SR 823