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Wyoming Highway 131 begins its southern end at the northern boundary of the Shoshone National Forest at Sinks Canyon State Park, hence its name Sinks Canyon Road. WYO 131 travels northeast to Lander, entering from the southwest. Upon entering, WYO 131 turns east and becomes Fremont Street before turning north onto South 5th Street. According to the WYDOT 1997 route log, the last 1.68 miles of Highway 131 are maintained by the City of Lander rather than WYDOT. WYO 131 meets its north end when it reaches U.S. Route 287 (Main Street) in Lander. This road was first paved in 1959.