Skip to main content
Run Vibes

Half Marathons in Connecticut

Connecticut has 12 upcoming Half Marathons. Half marathons are the fastest-growing race distance, offering a true endurance challenge with a more accessible training window than the full marathon.

12 upcoming races listed

Fun racesScenic racesCompetitive racesQuirky racesFestive racesFor a Cause racesBeginner-friendly
Ion Bank Cheshire Road Races

Experience flat, fast courses and scenic views at the Ion Bank Cheshire Road Races, complete with live music and post-race treats.

  • Fun
  • Scenic
  • Competitive
  • Festive
Sun, Apr 12, 2026, 8:30 AM EDT13.1 MilesCheshire, CT
Push PotentialRUN

Course · Hilly · Family-oriented

SRC 5k, 10k, Half Marathon

Experience a high-energy celebration of running, community, and Stamford pride, featuring the return of the half marathon to downtown.

  • Fun
  • Competitive
  • Festive
Sun, Apr 19, 2026, 8:00 AM EDT13.1 MilesStamford, CT
Steady EffortRUN

Course · Rolling · Timed race

Mystic Half Marathon & 10K

Join the Mystic Half Marathon in Mystic, CT for a 13.1-mile run with rolling terrain and mild spring weather.

Sun, May 17, 2026, 7:00 AM EDT13.1 MilesMystic, CT
Steady EffortRUN

Course · Rolling · Timed race

UConn Health Half Marathon

A dedicated half marathon experience awaits in Simsbury, CT, offering a focused run on June 6, 2026.

Sat, Jun 6, 2026, 7:15 AM EDT13.1 MilesSimsbury, CT
Steady EffortRUN

Course · Hilly · Timed race

Hamden Fest Half Marathon & 5k

Run a half marathon or 5K, then immerse yourself in the lively Hamden Fest, featuring food, music, arts, and community activities.

  • Fun
  • Festive
Sat, Jun 6, 2026, 8:30 AM EDT13.1 MilesHamden, CT
Push PotentialRUN

Course · Road · Hilly · Walkers welcome

Newtown Community Running Event

Experience Newtown's first half marathon, celebrating community spirit and supporting local ambulance services in honor of Greg Ritzinger.

  • Inaugural
  • Fun
  • Scenic
  • Competitive
  • Festive
  • For a Cause
Sun, Aug 30, 2026, 8:00 AM EDT13.1 MilesNewtown, CT
Steady EffortRUN

Course · Hilly · Timed race

Faxon Law New Haven Road Race

Celebrate Labor Day with a 13.1-mile run in New Haven, or join virtually and complete your distance on your own terms.

  • Fun
  • Festive
Mon, Sep 7, 2026, 8:30 AM EDT13.1 MilesNew Haven, CT
Steady EffortRUN

Course · Road · Hilly · Timed race

Hogsback Half Marathon

A fast, scenic half marathon on rural roads, supporting animal rescues with great amenities and a fun post-race celebration.

  • Fun
  • Scenic
  • Competitive
  • For a Cause
Sat, Sep 26, 2026, 8:30 AM EDT13.1 MilesColebrook, CT
Steady EffortRUN

Course · Timed race

Garavel SoNo Half Marathon | 5K

Discover Norwalk's scenic coastlines and historic charm, then celebrate your finish at a lively post-race party.

  • Fun
  • Scenic
Sun, Oct 4, 2026, 8:30 AM EDT13.1 MilesNorwalk, CT
Steady EffortRUN

Course · Rolling · Family-oriented

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

Experience classic fall New England scenery on beginner-friendly roads while supporting youth programs and prematurity research.

  • Scenic
  • For a Cause
Sun, Oct 18, 2026, 7:15 AM EDT13.1 MilesRidgefield, CT
Steady EffortRUN

Course · Hilly · Timed race

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

Run for a cause amidst stunning autumn scenery, with distances for every pace and age, all while supporting local charities.

  • Fun
  • Scenic
  • Competitive
  • For a Cause
Sun, Oct 25, 2026, 8:30 AM EDT13.1 MilesWESTON, CT
Steady EffortRUN

Course · Hilly · Family-oriented

Hillacious Half Marathon

Conquer a challenging course and honor military heroes, with all proceeds directly supporting local service members and their families.

  • Competitive
  • For a Cause
Sat, Nov 14, 2026, 10:00 AM EST13.1 MilesLitchfield, CT
Steady EffortRUN

Course · Rolling · Timed race

Weekly picks

Get weekly race picks for Connecticut

New races, upcoming events, and hidden gems in Connecticut — straight to your inbox.

No spam. Unsubscribe anytime. See our Privacy Policy.

More Half Marathon races

All races in ConnecticutHalf Marathons in Roxbury, CTHalf Marathons in Milford, CTHalf Marathons in Meriden, CTHalf Marathons in Hamden, CTHalf Marathons in New Haven, CTHalf Marathons in Stratford, CTHalf Marathons in Danbury, CTHalf Marathons in Hartford, CTHalf Marathons in Cornwall, CTHalf Marathons in Wallingford, CTHalf Marathons in Brookfield, CTHalf Marathons in West Hartford, CTHalf Marathons in Newtown, CTHalf Marathons in Stamford, CTHalf Marathons in Bethel, CT

Other distances in Connecticut

5Ks in Connecticut10Ks in ConnecticutMarathons in Connecticut