Colorado Mountain Half+ Series

Colorado Mountain Half+ Series 2026

The Colorado Mountain Half+ Series is a set of five mountain-distance events held at multiple Colorado locations in 2026. The series comprises four half marathons and one 25K, with a total series distance listed as 67.9 miles. Entries can cover any three, four, or all five events, and race results contribute to series points and awards.

Individual events and dates:

• Estes Park Half Marathon : June 21, 2026. The town sits at the base of Rocky Mountain National Park; the race passes local landmarks and town landscapes.
• Georgetown to Idaho Springs Half Marathon : August 8, 2026. Described as a mostly downhill and fast course from Georgetown Lake into Idaho Springs.
• Mt. Sneffels Half Marathon : August 15, 2026. The course follows a declining route through valley scenery and mountain ranges; the event description notes possible unusual wildlife sightings along the course.
• Ned Ned Half Marathon (Nederland) : September 12, 2026. The route runs mostly on trails through national forest areas with Barker Reservoir visible.
• Lead King Loop 25K (15.5 Miles) : September 13, 2026. A longer trail event noted for fall colors and a post-race area offering barbecue and beer for those 21 and over.

The series is presented in partnership with HAL Sports and each event is organized by local nonprofits that support youth programs. Visit the organization's website for the most recent information.