Great Mansfield Outdoors
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About the race
The Great Mansfield Outdoors takes place May 29, 2027 at Mansfield Outdoor Centre and Dufferin County Forest near Mulmur. The event uses predominantly single-track trails and features a brand new course for 2027. NEW for 2027 is a 100 mile option with a 30 hour cut-off, and the 100k Solo and 100k Relay will have longer cut-offs than in prior years.
Distances and basic formats:
- 100 Mile: one 10k start lap plus six 25k laps, about 3000 m elevation gain.
- 100K Grande: four 25k laps, about 2000 m elevation gain.
- 100K Relay: ten 10k laps, about 250 m elevation gain per lap.
- 50K: two 25k laps, about 1000 m elevation gain.
- 25K: one 25k lap, about 500 m elevation gain.
- 10K: one 10k lap, about 260 m elevation gain.
- 5K: one 5k lap, about 130 m elevation gain.
Relay teams consist of 2 to 5 runners; each runner must complete at least one 10 km loop and tag the next runner with a high five. Only one team member may be on course at a time, and teams have a 28 hour window to complete the 100 km format. Team captains register and receive team shirts.
All courses start and finish at Mansfield Outdoor Centre. There are both self-serve and full-serve aid stations, course flags by colour, and the event is cupless. Trail distances may not match watch readings. Trails are rooty; trail shoes are recommended in wet conditions. Port-a-potties are located in front of the barn and first aid is at the start/finish. Parking on the lodge side is free; parking along the barn is reserved. Visit the organization's website for the most recent information.
