Colorado State Highway 317State Highway 317 is a state highway in the US state of Colorado. The western terminus is at Colorado [State Highway 13|SH 13] in Hamilton, and the eastern terminus is at Routt County Route 29.Route descriptionSH 317 runs, starting at a junction with SH 13 in Hamilton. The highway follows the Williams [Fork (Yampa River)|Williams Fork River] to the east and ends at a junction with CR 29 just over the Routt [County, Colorado|Routt County] line.