Ultramarathons in Connecticut
17 upcoming Ultramarathon races in Connecticut for 2026 and beyond — with dates, locations, and registration links.
- Pat Griskus Olympic, Du, Sprint TriathlonSat, Jun 20, 2026 · Middlebury, CT50K22.7K51.8K40.2K
- Litchfield Hills TriathlonSat, Jul 11, 2026 · New Hartford, CT50K40.2K
- Bikes & Beers BranfordSat, Aug 15, 2026 · Branford, CT72.4K48.3K24.1K
- Lake Terramuggus Olympic TriathlonSat, Aug 15, 2026 · Marlborough, CT51.7KMarathon
- Ride with HalSun, Sep 6, 2026 · Westbrook, CT56.3K24.1K8K
- Iron Hike - Fall Everest / 29029 Everesting Ultra Trail Marathon - 61+ Miles | 29,029'+ Elevation | 72-Hour | Run, Hike or WalkThu, Oct 1, 2026 · Cornwall, CT98.2K
- Iron Hike - Fall Answer the Bell Ultra Trail Marathon - Full (Backyard Ultra Format) - 100+ Miles | 50,400' Elevation | 84-Hour | Run, Hike or WalkThu, Oct 1, 2026 · Cornwall, CT98.2K
- Iron Hike - Fall Olympus Mons Ultra Trail Marathon Relay - powered by Skratch Labs ® - 152+ Miles | 72,590' Elevation | 84-Hour | Run, Hike or WalkThu, Oct 1, 2026 · Cornwall, CT244.6K
- Iron Hike - Fall Everest / 29029 Everesting Ultra Trail Marathon Relay - 61+ Miles | 29,029'+ Elevation | 72-Hour | Run, Hike or WalkThu, Oct 1, 2026 · Cornwall, CT98.2K
- IronHike Mohawk Mountain Fall 2026Thu, Oct 1, 2026 · Mohawk Mtn Ski Area, Cornwall, CT46.7K100 Miles24.1K46.3K70.4K98.6K245.4K
- Iron Hike - Fall Olympus Mons Ultra Trail Marathon - powered by Skratch Labs ® - 152+ Miles | 72,590' Elevation | 84-Hour | Run, Hike or WalkThu, Oct 1, 2026 · Cornwall, CT244.6K
- Iron Hike - Fall Denali Ultra Trail Marathon - 43+ Miles | 20,825' Elevation | 48-Hour | Run, Hike or WalkFri, Oct 2, 2026 · Cornwall, CT69.2K
- Iron Hike - Fall Denali Ultra Trail Marathon Relay - 43+ Miles | 20,825' Elevation | 48-Hour | Run, Hike or WalkFri, Oct 2, 2026 · Cornwall, CT69.2K
- Iron Hike - Fall Answer the Bell Ultra Trail Marathon - Basic (Backyard Ultra Format) - 28+ Miles | 14,400'+ Elevation | 24-Hour | Run, Hike or WalkSat, Oct 3, 2026 · Cornwall, CT98.2K
- Iron Hike - Fall Double Kuwohi Trail Marathon Plus - 28+ Miles | 13,685' Elevation | 24-Hour | Run, Hike or WalkSat, Oct 3, 2026 · Cornwall, CT45.1K
- Iron Hike - Fall Double Kuwohi Trail Marathon Plus Relay - 28+ Miles | 13,685' Elevation | 24-Hour | Run, Hike or WalkSat, Oct 3, 2026 · Cornwall, CT45.1K
- Roxbury Fall ClassicSat, Nov 14, 2026 · Roxbury, CTHalf MarathonMarathon50K