Great Mansfield Outdoors
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Event overview
The Great Mansfield Outdoors takes place on May 30, 2026 at Mansfield Outdoor Centre and in the Dufferin County Forest near Mulmur. The event features single-track trail loops and in 2026 adds a 100 km option offered as both a solo and a relay. Registration has an early-bird period that ends February 1, 2026 and regular registration closes May 24, 2026. The event is sanctioned through Athletics Ontario and is part of the OUTRace series.
Distances and course
- 100K - Four laps of 25 km, majority single track, about 2000 m elevation total.
- 100K Relay - Four laps of 25 km, teams of 2-4, about 500 m elevation per lap.
- 50K - Two laps of 25 km, majority single track, about 1000 m elevation total.
- 25K - One lap of 25 km, majority single track, about 500 m elevation.
- 10K - One lap of 10 km, majority single track, about 260 m elevation.
- 5K - One lap of 5 km, majority single track, about 130 m elevation.
All courses start and finish at Mansfield Outdoor Centre. Courses are waymarked with colour flags, are cupless (participants must bring their own water receptacle), and include technical sections with many roots; trail shoes are recommended in wet conditions.
Logistics and services
Aid stations are both full-serve and self-serve, stocked with water, electrolytes, cookies, bars, chips and fruit. Drop bag service is available for 100K and 50K racers at a designated aid station. Portable washrooms are located at the barn and on the 25K/50K/100K course. Camping and cabin accommodations are available through Mansfield Outdoor Centre for additional fees. Parking at the venue is free with designated areas. Visit the organization's website for the most recent information.
