Marathon Races in Connecticut

Find upcoming marathon races in Connecticut — with dates, locations, and direct registration links.

21 upcoming marathon races found in Connecticut

Upcoming Marathon Races in Connecticut

Kids Run+3

Aug 30

1st Annual Newtown Community Running Event

Sun, August 30, 2026

Newtown, CT

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Half Marathon+6

Sep 7

Faxon Law New Haven Road Race

Mon, September 7, 2026

New Haven, CT

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Half marathon

Sep 12

2026 Gulf Beach Half Marathon

Sat, September 12, 2026

Milford, CT

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Half Marathon+1

Sep 13

Surftown Half Marathon, Relay & 5k

Sun, September 13, 2026

Hartford, CT

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Half Marathon

Sep 26

Hogsback Half Marathon

Sat, September 26, 2026

Colebrook, CT

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Half Marathon

Sep 27

Greenwich Half Marathon

Sun, September 27, 2026

Old Greenwich, CT

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Half Marathon+4

Oct 4

Garavel SoNo Half Marathon | 5K

Sun, October 4, 2026

Norwalk, CT

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5K Trail Race+2

Oct 4

Norfolk Land Trust Trail Race Series/Haystack Mountain Challenge

Sun, October 4, 2026

Norfolk, CT

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Eversource Hartford Marathon+2

Oct 10

Eversource Hartford Marathon, Half Marathon, Relay & Charity 5K

Sat, October 10, 2026

Hartford, CT

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Half Marathon+2

Oct 11

Mohawk Mountain Race Marathon, Half Marathon, 10k & 5k

Sun, October 11, 2026

Cornwall, CT

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Individual - Marathon+3

Oct 17

Tackle the Trail (TM)

Sat, October 17, 2026

Northeast, CT

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Half Marathon

Oct 18

Pamby Ridgefield Half Marathon & 7M

Sun, October 18, 2026

Ridgefield, CT

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Ridgefield Road Fest Half-Marathon+5

Oct 18

The Ridgefield Road Fest 50th ANNIVERSARY: 1/2 Marathon, 7-Miler, & Iris Fund 5K

Sun, October 18, 2026

Ridgefield, CT

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The Reservoir Run Races Half Marathon+2

Oct 25

The Reservoir Run Half Marathon, 5K, Kids Fun Runs & Family Stroll

Sun, October 25, 2026

WESTON, CT

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Hillacious Half Marathon+2

Nov 14

Hillacious Half Marathon

Sat, November 14, 2026

Litchfield, CT

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Ultra+1

Nov 14

Roxbury 50k, Marathon & Half Marathon

Sat, November 14, 2026

Roxbury, CT

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Half Marathon+2

Nov 14

Roxbury Fall Classic

Sat, November 14, 2026

Roxbury, CT

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Half Marathon

Nov 15

Tarrywile 30k & Half Marathon

Sun, November 15, 2026

Danbury, CT

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Storybrook Half Marathon

Nov 21

Storybook Half Marathon

Sat, November 21, 2026

Stratford, CT

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Half Marathon+3

Apr 11

Ion Bank Cheshire Road Races

Sun, April 11, 2027

Cheshire, CT

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Stamford Run Club 5k/10k/Half Marathon

Apr 18

Stamford Run Club 5k/10k/Half Marathon 2026

Sun, April 18, 2027

Stamford, CT

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