A scenic landscape view of the small town of Rollinsville Colorado in Gilpin County with the reflection of a beautiful sunset sky in a calm lake. Rollinsville is located in the mountains southwest of the city of Boulder, on the flank of a hill above South Boulder Creek along State Highway 119 between Nederland and Black Hawk. It consists of a small cluster of residences and several businesses at the terminus of the road leading westward up to Rollins Pass at the summit of the Front Range and continental divide. The population as of the 2010 Census was 181.