Wyoming Highway 31 (WYO 31), also known as Cold Springs Road) is a state highway in Big Horn County, Wyoming, United States, that connects U.S. Route 16 / U.S. Route 20 / Wyoming Highway 789 (US 16 / US 20 / WYO 789) in Manderson with County Road R49 (CR R49) in Hyattville.
WYO 31 is an eastâÂÂwest highway that starts in the town of Manderson at US 16 / US 20 / WYO 789 and heads north through Manderson as Sherman and Marshall Streets, but turns east as it leaves the town to head toward Hyattville. Nearing its end, WYO 31 turns south and enters the census-designated place of Hyattville and passes through the community as Main Street. The WYO 31 designation ends south of Hyattville. The roadway continues as CR R49.
Medicine Lodge State Archaeological Site in Hyattville can be reached by using WYO 31.
Wyoming Highway 31 Spur (WYO 31 Spur) is an unsigned long spur route of WYO 31 in Manderson. WYO 31 Spur travels from WYO 31 west to US 16 / US 20 / WYO 789.