Last Driven September 2017 MP: 31.1 Location: McKenna Tanwax and Spanaway-McKenna Hwy, McKenna SR 507 continues straight to Yelm (Historic Photo: March 2007) MP: 28.33 Location: Yelm Ave and 1st St S, Yelm SR 510 continues down Yelm Ave, SR 507 turns left onto 1st St S MP: 28.24 Location: Yelm Ave and 1st St S, … Continue reading State Route 507, SR 702 to SR 510