Spring Challenge
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Merrell Spring Challenge
The Merrell Spring Challenge is an adventure event for women taking place 25th-27th September 2026. Teams of three move through a combination of rafting, biking and hiking in time-based formats rather than fixed-distance races.
Course distances change each year according to terrain, so the event recommends choosing by the expected time on course instead of by kilometres. Course designers set target winning times for each format: the 3 hour event aims for about one hour each of rafting, biking and hiking; the 6 hour event provides a longer, balanced mix of disciplines; and the 9 hour event is a full-day format intended for experienced teams.
Sample distances for the formats are:
- 3 hour event: Raft 9 km, Bike 18 km, Hike 3 km
- 6 hour event: Raft 9 km, Bike 30 km, Hike 8 km
- 9 hour event: Raft 9 km, Bike 32 km, Hike 23 km
The event description notes that time on course is a better guide to the level of effort than total kilometres, because terrain affects how long each segment takes. The event also frames participation around teamwork, preparation and shared endurance across the chosen format. Visit the organization's website for the most recent information.