Running Race Calendar in Connecticut, United States

UConn Health Half Marathon

Simsbury, Connecticut, United States

Jun 6, 2026 (Sat)

Running

Half-Marathon 10K 5K

America’s 250th – Greenwich Community 5K & Fun Mile (1 Mile)

Greenwich, Connecticut, United States

Jun 6, 2026 (Sat)

Running

5K 1.6K

SongStrong 5K

Guilford, Connecticut, United States

Jun 6, 2026 (Sat)

Running

5K

Athletic Brewing Company Fairfield Road Races

Fairfield, Connecticut, United States

Jun 6, 2026 (Sat) – Jun 7, 2026

Running

5K 26.1K 1.6K 0.8K +1

Kelley's Pace National Donut Day Relay

Mystic, Connecticut, United States

Jun 6, 2026 (Sat)

Running

Relay

Iron Hike - Spring Kuwohi Trail Half Marathon Plus Relay - 15 Miles | 7,140' Elevation | 12-Hour | Run, Hike or Walk

Cornwall, Connecticut, United States

Jun 6, 2026 (Sat) – Jun 7, 2026

Running

24.1K

Iron Hike - Spring Kuwohi Trail Half Marathon Plus - 15 Miles | 7,140' Elevation | 12-Hour | Run, Hike or Walk

Cornwall, Connecticut, United States

Jun 6, 2026 (Sat) – Jun 7, 2026

Running

24.1K

Heart of Eastford 5K

Eastford, Connecticut, United States

Jun 6, 2026 (Sat)

Running

5K

IronHike Mohawk Mountain Spring 2026

Cornwall, Connecticut, United States

Jun 4, 2026 (Thu) – Jun 7, 2026

Trail running, Running

Ultra 46.7K 24.1K 46.3K +13

Worthington Early Summer 5k Running Series

Somers, Connecticut, United States

Jun 3, 2026 (Wed) – Jul 1, 2026

Running

5K +1

Summer Cross Country Series

New Canaan, Connecticut, United States

Jun 2, 2026 (Tue) – Sep 1, 2026

Free

Running

4.3K 4.6K 4.4K 4.8K +10

Belltown Spring Sprint 2M Run & Walk, Kids Run

East Hampton, Connecticut, United States

Jun 2, 2026 (Tue)

Running, Walking

3.2K 0.5K