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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62 races within 25 mi of Ayer, MA
Southboro, MA18 mi away
Good weather · 77/100 Typical: 45° / 31°F · 32% rain
Stow, MA10 mi away
Good weather · 77/100 Typical: 45° / 31°F · 32% rain
6% faster times (5K)past finishers
Lexington, MA19 mi away
Good weather · 77/100 Typical: 45° / 31°F · 32% rain
11% faster times (5K)past finishers
Wellesley, MA24 mi away
Good weather · 77/100 Typical: 45° / 31°F · 32% rain
12% faster times (5K)past finishers
Amherst, NH21 mi away
Good weather · 73/100 Typical: 43° / 28°F · 32% rain
Lexington, MA19 mi away
Good weather · 76/100 Typical: 45° / 31°F · 32% rain
12% faster times (5K)past finishers
Marlborough, MA15 mi away
Good weather · 82/100 Typical: 44° / 30°F · 33% rain
7% faster times (10 mi)past finishers
Worcester, MA24 mi away
Fair weather · 69/100 Typical: 39° / 25°F · 31% rain
Wellesley Hills, MA23 mi away
Good weather · 71/100 Typical: 42° / 28°F · 34% rain
Nashua, NH13 mi away
Good weather · 71/100 Typical: 42° / 28°F · 34% rain
Worcester, MA21 mi away
Fair weather · 68/100 Typical: 39° / 25°F · 31% rain
9% faster times (5K)past finishers
Wilmington, MA21 mi away
Fair weather · 68/100 Typical: 39° / 26°F · 36% rain
14% faster times (5K)past finishers
Sterling, MA13 mi away
Fair weather · 59/100 Typical: 33° / 19°F · 34% rain
Temple, NH24 mi away
Fair weather · 56/100 Typical: 31° / 16°F · 33% rain
8% faster times (5K)past finishers
Lexington, MA19 mi away
Fair weather · 64/100 Typical: 35° / 21°F · 28% rain
12% faster times (5K)past finishers
Worcester, MA25 mi away
Good weather · 71/100 Typical: 43° / 25°F · 29% rain
7% faster times (5K)past finishers
Andover, MA21 mi awayRegistration opens Dec 10, 2026
Ideal weather · 90/100 Typical: 53° / 35°F · 37% rain
Hopkinton, MA24 mi away
Good weather · 84/100 Typical: 54° / 36°F · 35% rain
Weston, MA18 mi awayRegistration opens Jan 1, 2027
Ideal weather · 92/100 Typical: 58° / 39°F · 37% rain