Discover The Best Half Marathons in Colorado
Browse our listing of half marathons in Colorado to find one that suits your goals.
upcoming 1/2 marathons in Colorado
February 21, 2026
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Colorado Springs
March 29, 2026
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Wellington
April 12, 2026
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Arvada
April 19, 2026
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Fort Collins
May 3, 2026
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Longmont
May 9, 2026
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Colorado Springs
May 16, 2026
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June 6, 2026
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June 7, 2026
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Boulder
July 18, 2026
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Castle Rock
July 18, 2026
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Aspen
August 1, 2026
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Boulder
August 16, 2026
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August 23, 2026
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Westminster
September 19, 2026
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Colorado Springs
September 20, 2026
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Fort Collins
September 26, 2026
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September 27, 2026
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Boulder
October 3, 2026
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Colorado Springs
October 11, 2026
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Westminster