State Highway 15 in the U.S. state of Colorado is a north–south, then east–west, state highway in the San Luis Valley region of Southern Colorado.

It connects the two towns of Monte Vista and La Jara.

After heading south for about 12 miles (19 km), at the Rio Grande-Conejos county line, there exists an 8-mile (13 km) gap[1] filled in by Conejos County Route 6.

[2] After the gap, SH 15 reappears in Centro and heads east to pass through Capulin, cross over the La Jara Creek, and end at US 285, north of La Jara.The route was established in the 1920s as a much longer route, but it was gradually cut down to its current length.

[2] Media related to Colorado State Highway 15 at Wikimedia Commons