Segment Traildown
Fort Collins, Colorado
from Free
RegisterColorado race calendar
October 2026 races in Colorado
Running races in Colorado in October 2026: 88 upcoming 5Ks, 10Ks, half marathons, marathons, and trail races with dates and entry fees.
88
upcoming races
2,026
year
October 2026
Colorado Springs Marathon, Half, 5K, and Kids K
Colorado Springs, Colorado7:00 AM start
from Free
Registerfrom Free
RegisterRim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon
Canon City, Colorado7:30 AM startTrail
from Free
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from $50
Registerfrom Free
Registerfrom $80
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from $25
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from $10
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from Free
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from $110
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from Free
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from $30.75
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from $50
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from $25
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from $15
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from $25
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from $40
RegisterWindsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run
Windsor, Colorado7:00 AM start
from $20
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from Free
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from $10
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from $10
RegisterLiberty Energy 5K - Benefiting the Bettering Human Lives Foundation
Denver, Colorado9:45 AM start
5KKids
from Free
Register
from $39
Register
from $60.38
RegisterKids' Fall Series - Where Kids Run Free!
Colorado Springs, Colorado11:30 AM start
from Free
Register
from $25
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from $30
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from $30
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from $25
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from $45
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from $30
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from Free
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from $10
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from Free
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from $20
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from $15
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