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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84 races within 25 mi of Naperville, IL
Bolingbrook, IL6 mi awayRegistration opens Feb 27, 2027
Fair weather · 62/100 Typical: 83° / 63°F · 38% rain
7% slower times (5K)past finishers
Wheaton, IL5 mi away
Fair weather · 61/100 Typical: 82° / 63°F · 40% rain
5% slower times (5K)past finishers
Wheaton, IL4 mi awayRegistration opens Dec 7, 2026
Good weather · 76/100 Typical: 77° / 56°F · 27% rain
Greater Chicago, IL19 mi away
Good weather · 78/100 Typical: 76° / 55°F · 31% rain
Chicago, IL23 mi away
Good weather · 76/100 Typical: 69° / 60°F · 38% rain
16% slower times (5K)past finishers
Schaumburg, IL17 mi awayRegistration opens Jan 1, 2027
Ideal weather · 90/100 Typical: 73° / 53°F · 35% rain
Romeoville, IL9 mi awayRegistration opens Jun 22, 2027
Ideal weather · 92/100 Typical: 72° / 51°F · 28% rain
38% slower times (5K)past finishers
Lisle, IL4 mi awayRegistration opens Jul 31, 2027
Ideal weather · 91/100 Typical: 71° / 50°F · 30% rain