Winter ultramarathons in Colorado, United States

High-altitude 50k on technical trails through Staunton State Park, featuring rugged mountain terrain, granite cliffs, meadows, and frequent wintry conditions.

1km out-and-back trail with a 540-foot ascent, poker chip turnarounds, and milestone awards for multiple ascents

Trail loops in challenging winter conditions supporting air quality nonprofits and environmental education

Winter ultrarunning on multiple scenic loops through varied terrain, dramatic Pike's Peak vistas, and Colorado Front Range landscapes in Cheyenne Mountain State