Marathons in Connecticut 2026 | Upcoming Races & Dates

There are 8 marathons in Connecticut scheduled for 2026. The next is the Ride with Hal in Westbrook on September 6. Connecticut marathons run primarily August through July.

Lake Terramuggus Olympic Triathlon

Sat, Aug 15 · Marlborough, CT Marlborough

AquabikeOlympic Relay TriOlympic Tri

From $85 Open

Ride with Hal

Sun, Sep 6 · Westbrook, CT Westbrook

5 Mile Run15 Mile Bike Ride35 Mile Bike Ride

From $40 Closed

Iron Hike - Fall Denali Ultra Trail Marathon Relay - 43+ Miles | 20,825' Elevation | 48-Hour | Run, Hike or Walk

Fri, Oct 2 · Cornwall, CT Cornwall

Denali - 43+ Miles | 20,825' Elevation | 48-Hour

From $0 Closed

Iron Hike - Fall Denali Ultra Trail Marathon - 43+ Miles | 20,825' Elevation | 48-Hour | Run, Hike or Walk

Fri, Oct 2 · Cornwall, CT Cornwall

Denali - 43+ Miles | 20,825' Elevation | 48-Hour

From $0 Closed

Iron Hike - Fall Double Kuwohi Trail Marathon Plus Relay - 28+ Miles | 13,685' Elevation | 24-Hour | Run, Hike or Walk

Sat, Oct 3 · Cornwall, CT Cornwall

Double Kuwohi - 28+ Miles | 13,685' Elevation | 24-Hour

From $0 Closed

Iron Hike - Fall Double Kuwohi Trail Marathon Plus - 28+ Miles | 13,685' Elevation | 24-Hour | Run, Hike or Walk

Sat, Oct 3 · Cornwall, CT Cornwall

Double Kuwohi - 28+ Miles | 13,685' Elevation | 24-Hour

From $0 Closed

Capalbo Strong Walk

Sun, Oct 4 · Fairfield, CT Fairfield

Capalbo Strong WalkCapalbo Strong Walk: 12 and UnderVirtual Walk +1

From $20 Open

Litchfield Hills Triathlon

Sat, Jul 10 · New Hartford, CT New Hartford

AquaBikeAquaBikeRELAY TEAM - Triathlon +3

From $89 Open Closing Soon

Marathons in Connecticut — 2026

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