AMP: 0 Location: Lakeside Dr and US-26, Guernsey WYO 317 is a short spur that serves a state park 1.66 miles into it AMP: 1 Location: Lakeside Dr at Guernsey State Park, Platte Cty Welcome to Guernsey State Park, home of the Guernsey Reservoir. The state highway ends here E to WYO 270, W to … Continue reading Wyoming Highway 317, US-26 to Guernsey State Park