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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105 races within 25 mi of Sudbury, MA
Canton, MA19 mi awayRegistration opens Apr 1, 2027
Fair weather · 56/100 Typical: 83° / 64°F · 41% rain
Boston, MA20 mi away
Ideal weather · 92/100 Typical: 71° / 53°F · 36% rain
7% faster times (5K)past finishers
Jamaica Plain, MA17 mi awayRegistration opens Apr 4, 2027
Ideal weather · 92/100 Typical: 69° / 51°F · 36% rain
Wrentham, MA23 mi awayRegistration opens Jul 9, 2027
Ideal weather · 93/100 Typical: 58° / 41°F · 31% rain
Cambridge, MA18 mi awayRegistration opens Dec 15, 2028
Fair weather · 61/100 Typical: 33° / 19°F · 28% rain