Trail 50k events in Colorado, United States
Find trail 50k events in Colorado, United States. Compare 13 upcoming events by date and location. Open a race guide for the course, recorded editions and official entry information where available.
Events to explore include Bridge Burner Ultra, Kessel Run Ultra and Colorado Cold Rush Ultra.
Compare running races by distance, date and surface, from shorter road events to trail races and ultras.
13 listed events · 13 with upcoming dates
Upcoming 50k events
13 matching events, earliest date first. Entry availability is shown separately.
Bridge Burner Ultra
USACanon City, Colorado
Trail races through the Royal Gorge area, starting in Canon City and following riverside paths and mountain trails.
Date listed · latest organiser confirmation not yet checked.
Kessel Run Ultra
USAFruita, Colorado
High-desert trail races on the North Fruita singletrack, with five distances and separate morning starts.
Date listed · latest organiser confirmation not yet checked.
Colorado Cold Rush Ultra
USAColorado Springs, Colorado
Trail races from Bear Creek Regional Park, with longer routes climbing historic High Drive above Colorado Springs.
Date listed · latest organiser confirmation not yet checked.
Sawmill Trail Runs
USAPine, Colorado
Winter trail races through Staunton State Park’s meadows, forests and granite outcrops near Pine.
Date listed · latest organiser confirmation not yet checked.
Rattler Trail Race
USAColorado Springs, Colorado
Trail races from Palmer Park in Colorado Springs.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Valkyrie Trail Race
USAColorado Springs, Colorado
Women-focused trail races in Cheyenne Mountain State Park.
Date listed · latest organiser confirmation not yet checked.
Weld Your Mettle Running Festival
USAEaton, Colorado
Loop running races and timed endurance challenges near Eaton.
Date listed · latest organiser confirmation not yet checked.
Summits Trail Runs
USAGranby, Colorado
Mountain trail races at Granby Ranch Resort, with shorter races and ultra distances.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Pikes Peak Ultra
USAColorado Springs, Colorado
Mountain ultras and shorter trail races above Colorado Springs.
Date listed · latest organiser confirmation not yet checked.
Sheep Mountain Trail Runs
USAFairplay, Colorado
Mountain trail races and a half marathon based at Fairplay Beach.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Rock Hawk Trail Races
USACastle Rock, Colorado
Trail races on the Miller Park and Ridgeline trail systems.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Snow Mountain Ranch Trail Running Festival
USAGranby, Colorado
Trail races on Nordic tracks at Snow Mountain Ranch.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Sangre de Cristo Trail Festival
USAWestcliffe, Colorado
A mountain trail festival near Westcliffe with ultras on Saturday and shorter races on Sunday.
· Status TBC
Date listed · latest organiser confirmation not yet checked.
Race archive
Past races and previous editions
Looking back at a race? Browse the guides below for recorded editions. This section also includes events awaiting a new date and cancelled editions. Previous editions of races in the upcoming calendar are available through their race guides above.
No separate archived race guides are listed for this selection yet.
View full race archive (0) →Choosing a race in Colorado
The unfiltered upcoming calendar includes events in Colorado Springs (4), Granby (2), Canon City (1). Use the town filter to compare locations, then check the race guide for the start venue and organiser’s travel information.
Questions about 50k events in Colorado
What should I check before a running event in Colorado?
Choose your distance, then check the route, elevation, cut-off time and entry conditions in the organiser’s race guide.
Which trail 50k events are coming up in Colorado, United States?
Bridge Burner Ultra is listed for 24 October 2026. Kessel Run Ultra is listed for 7 November 2026. Colorado Cold Rush Ultra is listed for 21 November 2026. Check the race guide and organiser’s latest information before making plans.
Where can I find race entry details for Colorado, United States?
Follow the link from the race guide to the organiser or entry provider, where one is available. Check the entry deadline, eligibility and current availability there. A listed race date does not necessarily mean entries are still open.
Why has a race moved out of the upcoming calendar?
Once its listed dates have passed, a race moves to the past-editions view unless another upcoming edition is recorded. Cancelled events also leave the upcoming list. The race guide stays available, and the event returns when a new date is added.