St. Croix 40 Winter Ultra
Hinckley, United States
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trail50 km · 5 km · 10 km · 25 kmPast eventultra
O'Brien Trail Races
Saturday, 26 September 2026 · Marine on St Croix, MN, United States
Dates and distances
- Past date
5 km
5k
- Past date
10 km
10K
- Past date
25 km
25k
- Past date
50 km
50K
- Date
- Saturday, 26 September 2026
- Location
- Marine on St Croix, MN, United States
- Distances
- 50 km · 5 km · 10 km · 25 km
Plan with confidence. Race dates, prices and entry availability can change. Always confirm the latest details with the organiser before making plans. Check the official race website ↗Listing last updated 4 October 2026. This is a listing update, not a guarantee that every detail has been rechecked.
About This Race
O'Brien Trail Races is a 50 km ultra trail race held in Marine on St Croix, MN. The event takes place in September 2026.
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