Marathons in Connecticut 2026 | Upcoming Races & Dates | My Next Race

There are 11 marathons in Connecticut scheduled for 2026. The next is the Woodstock CT Marathon & Relay in Woodstock on May 2. Connecticut marathons run primarily May through October.

Woodstock CT Marathon & Relay

Sat, May 2 · Woodstock, CT Woodstock

Woodstock CT Relay (TEAMS)Woodstock CT Marathon (INDIVIDUAL)

From $35 Open

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

Fri, Jun 5 · Cornwall, CT Cornwall

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

From $0 Closed

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

Fri, Jun 5 · Cornwall, CT Cornwall

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

From $0 Closed

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

Sat, Jun 6 · Cornwall, CT Cornwall

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

From $0 Closed

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

Sat, Jun 6 · Cornwall, CT Cornwall

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

From $0 Closed

Litchfield Hills Triathlon

Sat, Jul 11 · New Hartford, CT New Hartford

AquaBikeOlympic TriathlonRELAY TEAM - Triathlon

From $89 Open

Lake Terramuggus Olympic Triathlon

Sat, Aug 15 · Marlborough, CT Marlborough

AquabikeOlympic TriOlympic Relay Tri

From $85 Open

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