Race catalog · Updated nightly
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Upcoming running, cycling, triathlon and ultra races, updated nightly from RunSignup, BikeReg and ACTIVE. Missing a race? Submit it
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Race catalog · Updated nightly
Upcoming running, cycling, triathlon and ultra races, updated nightly from RunSignup, BikeReg and ACTIVE. Missing a race? Submit it
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58 races within 25 mi of Castle Rock, CO
Castle Rock, CO0 mi away
Fair weather · 62/100 Typical: 88° / 59°F · 44% rain
Highlands Ranch, CO11 mi away
Good weather · 76/100 Typical: 85° / 58°F · 48% rain
11% slower times (5K)past finishers
Woodland Park, CO25 mi awayRegistration opens Jan 1, 2027
Good weather · 76/100 Typical: 81° / 53°F · 43% rain
Lakewood, CO24 mi away
Ideal weather · 90/100 Typical: 79° / 50°F · 23% rain
Englewood, CO14 mi awayRegistration opens Jan 11, 2027
Ideal weather · 99/100 Typical: 72° / 43°F · 17% rain
Sedalia, CO15 mi awayRegistration opens Dec 1, 2026
Ideal weather · 99/100 Typical: 64° / 36°F · 16% rain
Littleton, CO16 mi away
Ideal weather · 95/100 Typical: 64° / 36°F · 16% rain