MP: 31.18 Location: Yale Bridge Rd and Lewis River Rd, Yale, Cowlitz Cty Reassurance shield after the SPUR turnoff.   MP: 27.91 Location: Yale Bridge Rd and Frasier Rd, Cowlitz Cty The Yale Bridge, a single lane cablestay (?) bridge. The river serves as the Cowlitz/Clark County Line   MP: 24.78 Location: Yale Bridge Rd … Continue reading State Route 503, SR 503 SPUR to SR 502