Barr Lake
📍 Brighton, CO•📅 Saturday, Jun 13, 2026•1 events
Half Marathon
Quick registration
Half Marathon
Starts 6/13/2026, 12:00:00 AM
Register Half Marathon
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Race guides
Marathon Races, Co
Browse upcoming races and find your next event.
Found 28 upcoming races•Updated daily•Last updated: Jun 9
Barr Lake
📍 Brighton, CO•📅 Saturday, Jun 13, 2026•1 events
50K, 30K, Half Marathon, 15K, 5K
FCRC Marathon Training Program
📍 Fort Collins, CO•📅 Saturday, Jun 20, 2026•1 events
FCRC 2026 Marathon Training Program
Quick registration
FCRC 2026 Marathon Training Program
Starts 6/20/2026, 7:30:00 AM• Current price: $20
Silverton Alpine Runs
📍 Silverton, CO•📅 Saturday, Jul 18, 2026•1 events
50K, Marathon, 8 Miler
Silverton Alpine Runs
📍 Silverton, CO•📅 Saturday, Jul 18, 2026•2 events
Marathon DUO + Kendall 12MMarathon
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Marathon
Starts 7/18/2026, 12:00:00 AM
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Marathon DUO + Kendall 12M
Starts 7/18/2026, 12:00:00 AM
Aspen Valley Marathon
📍 Aspen, CO•📅 Saturday, Jul 25, 2026•1 events
26.2 Miles
Quick registration
26.2 Miles
Starts 7/25/2026, 6:00:00 AM• Current price: $195
Register 26.2 Miles
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Aspen Backcountry
📍 Aspen, CO•📅 Saturday, Aug 1, 2026•2 events
MarathonHeavy Half Marathon
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Heavy Half Marathon
Starts 8/1/2026, 12:00:00 AM
Marathon
Starts 8/1/2026, 12:00:00 AM
Register Marathon
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Aspen Backcountry
📍 Aspen, CO•📅 Saturday, Aug 1, 2026•1 events
50 Kilometer, Marathon, Heavy Half Marathon
Bound for Boston Marathon & Half Marathon - Denver
📍 Denver, CO•📅 Sunday, Aug 2, 2026•2 events
26.2 Miles26.2 Miles
Quick registration
26.2 Miles
Starts 8/2/2026, 6:30:00 AM• Current price: $75
Register 26.2 Miles
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Choice City Running Festival
📍 Fort Collins, CO•📅 Friday, Aug 7, 2026•1 events
BEST DEAL: Mountain MILE + 1/2 Marathon
Quick registration
BEST DEAL: Mountain MILE + 1/2 Marathon
Starts 8/7/2026, 5:00:00 PM• Current price: $80
Westminster Trail Races
📍 Westminster, CO•📅 Saturday, Aug 15, 2026•1 events
50K, 35K, Half Marathon, 10K, 5K
Westminster Trail Races
📍 Westminster, CO•📅 Saturday, Aug 15, 2026•1 events
Half Marathon
Quick registration
Half Marathon
Starts 8/15/2026, 12:00:00 AM
Register Half Marathon
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Staunton Rocks! Marathon and Half Marathon
📍 Pine, CO•📅 Saturday, Aug 22, 2026•1 events
26.2 Miles
Quick registration
26.2 Miles
Starts 8/22/2026, 11:00:00 AM• Current price: $110
Register 26.2 Miles
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American Heroes Run
📍 Longmont, CO•📅 Friday, Sep 11, 2026•2 events
1/2 MarathonMarathon
Quick registration
1/2 Marathon
Starts 9/11/2026, 12:00:00 AM
Register 1/2 Marathon
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Marathon
Starts 9/11/2026, 12:00:00 AM
Register Marathon
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American Heroes Run
📍 Longmont, CO•📅 Friday, Sep 11, 2026•1 events
100 Miler, Marathon, 24 hrs, 1/2 Marathon, 9.11 Miler, 9 hrs & 11 min, 6 hour open start, 5K, Virt
Snow Mountain Ranch
📍 Granby, CO•📅 Saturday, Sep 12, 2026•1 events
50K, 33K, Half Marathon, 10K, 5K
Steele Trap Trail Run
📍 Loma, CO•📅 Saturday, Sep 12, 2026•1 events
26.2 Miles
Quick registration
26.2 Miles
Starts 9/12/2026, 11:00:00 AM• Current price: $50
Register 26.2 Miles
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Deep Creek Trail Half Marathon
📍 Telluride, CO•📅 Saturday, Sep 26, 2026•1 events
1/2 Marathon
WILD Wahatoya Runs
📍 La Veta, CO•📅 Saturday, Sep 26, 2026•1 events
50K, 1/2 Marathon, 8 Miler
Team CKF Running Series
📍 Aspen, CO•📅 Saturday, Feb 28, 2026•2 events
2026 BMW Berlin Marathon - Team CKF2027 Tokyo Marathon - Team CKF
Quick registration
2026 BMW Berlin Marathon - Team CKF
Starts 9/27/2026, 4:00:00 AM• Current price: $0
2027 Tokyo Marathon - Team CKF
Starts 3/7/2027, 5:00:00 AM• Current price: $0
The Bear Chase
📍 Lakewood, CO•📅 Saturday, Oct 3, 2026•1 events
100K, 50 Mile, 50K, Half Marathon Sunday, 10K Sunday, 5K Sunday
Colorado Springs Marathon, Half, 5K, and Kids K
📍 Colorado Springs, CO•📅 Saturday, Oct 3, 2026•5 events
26.2 Miles26.2 Miles26.2 Miles26.2 Miles26.2 Miles
Quick registration
26.2 Miles
Starts 10/3/2026, 12:00:00 AM• Current price: $70
Register 26.2 Miles
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Durango Marathon
📍 Durango, CO•📅 Sunday, Oct 11, 2026•2 events
26.2 MilesDurango Marathon Weekend 5k
Quick registration
Durango Marathon Weekend 5k
Starts 10/11/2026, 8:30:00 AM• Current price: $20
26.2 Miles
Starts 10/11/2026, 8:00:00 AM• Current price: $115
Register 26.2 Miles
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Marathon At The MAC
📍 Castle Rock, CO•📅 Saturday, Nov 7, 2026•1 events
Marathon, 1/2 Marathon, 5K
Louisville Trail Race
📍 Louisville, CO•📅 Saturday, Nov 14, 2026•1 events
Half Marathon, 10K, 5K
Colorado Cold Rush Ultra
📍 Colorado Springs, CO•📅 Saturday, Nov 21, 2026•1 events
50K, 1/2 Marathon, 10K
22nd Annual Run Through Time Trail Marathon and Half Marathon
📍 Salida, CO•📅 Saturday, Mar 13, 2027•1 events
26.2 Miles
Quick registration
26.2 Miles
Starts 3/13/2027, 8:00:00 AM
Register 26.2 Miles
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Valkyrie Trail Race
📍 Colorado Springs, CO•📅 Saturday, May 8, 2027•1 events
50K, Marathon, 30K, 1/2 Marathon, 8 Miler, 4 Miler