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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53 races within 25 mi of Oswego, IL
Wheaton, IL10 mi awayRegistration opens Dec 7, 2026
Good weather · 76/100 Typical: 77° / 56°F · 27% rain
Romeoville, IL12 mi awayRegistration opens Jun 22, 2027
Ideal weather · 92/100 Typical: 72° / 51°F · 28% rain
38% slower times (5K)past finishers
Lisle, IL15 mi awayRegistration opens Jul 31, 2027
Ideal weather · 91/100 Typical: 71° / 50°F · 30% rain