Mt Sopris Run-off

Event overview

The Mt. Sopris Run-off is a trail running event in Carbondale, Colorado, scheduled for Sunday, May 17, 2026. The event features two point-to-point trail races that start at Flying Dog Ranch and finish at Rock Bottom Ranch in Basalt. The event is presented by Independence Run & Hike and is part of a larger weekend of trail-related activities, including a Trail Running Film Festival at the Independence Run & Hike store.

Distances

• 10-Mile
• 25k

Course descriptions

Both courses use the “Up & Over” single-track route. Runners begin on Prince Creek Road (pavement and dirt) for 1.75 miles, then follow Prince Creek Trail for 0.35 miles and Christmas Tree trail for 0.50 miles. At 2.60 miles the route has climbed approximately 725 feet. The route continues on North Porcupine for about 2.7 miles, then onto Outie for about 1.0 mile before turning onto Buckhorn at mile 6.30.

The 10-mile course descends on Buckhorn, losing about 500 feet over 2.4 miles, then drops another 500 feet over 1.3 miles via switchbacks to the Rio Grande Trail (pavement) before entering Rock Bottom Ranch for the finish.

The 25k follows Buckhorn but turns onto Buckhorn Traverse for about 4.0 miles, including a 450-foot climb over the last 2.0 miles to reach Glassier Trail. The final stretch includes a 2.3-mile descent losing about 800 feet, then a 1.5-mile slightly downhill section on the Rio Grande Trail before entering Rock Bottom Ranch.

Racers are required to reach the third aid station by 11 A.M. Visit the organization's website for the most recent information.