Wyoming Highway 315 (WYO 315) is a 3.01-mile-long (4.84 km) state highway in the southeastern part of Platte County, Wyoming, named Pioneer Road, located just east of Slater, Wyoming.

Wyoming Highway 315 begins its south end at Wyoming Highway 314 (Slater Road) and travels north 3.01 miles (4.84 km) to its north end at Platte CR 232 (Bordeaux Road).

[2][3] The entire route is in Platte County.

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