XTERRA O-SEE Ultra Marathon 2025
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A distance for every taste
65 kmTOP
50.3 km
25.3 km
16.9 km
Kids
- End of June 2025
- Elevation gain : 2620mD+
50.3 km : O-SEE 50K
Trail- End of June 2025
- Elevation gain : 2120mD+
25.3 km : O-SEE 25K
Trail- End of June 2025
- Elevation gain : 1050mD+
16.9 km : O-SEE 15K
Trail- End of June 2025
- Elevation gain : 590mD+
Races for children / juniors 👶
Includes one or more races for children!
More races await you
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Made in France, between Lyon and Nantes
Made in France, between Lyon and Nantes