Date
Sat, 29 May 2027
Start
10:00
Venue
Mansfield Outdoor Centre, 937365 Airport Rd, Mulmur, Ontario
Mansfield, Dufferin County
Countdown
May
One 25 km lap of the course with only light climbing. A good step up from 10K without committing to an ultra.
Key facts
018-hour cut-off, plenty of time to run or walk it
02One 25 km lap
Create a free training plan for the Great Mansfield Outdoors 25 km
7-day free trial, no card required
The course
One lap, on repeat
Mansfield · one lap
Distance25km
Total climb500m
Start · finishOne lap · elevation
0 kmDrag map to rotate22.7 km
Weather
Late-May, Mansfield
22°CTypical high
9°CTypical low
-2°CColdest in 20 years
41%Days with rain
Highs around 22°C and lows around 9°C, but it has dropped to -2°C. Rain on 41% of days. Pack for the cold end, not the average.
NASA POWER data, 2006-2025, the week either side of race day
2024 results
Who finishes, and how
#RiderTimeAvg speed
01Haley Thomas02:31:509.9 km/h
02Lauren Roberts02:37:189.5 km/h
03Nicole Marini02:39:599.4 km/h
36
Women finishers
3:35:22
Median time
7.0 km/h
Median speed
Women · 2024 results, as published by the organiser.
How fast could you finish?
Get a prediction based on your recent training
Organiser
Training
Training for the Great Mansfield Outdoors 25 km
We don't do generic plans. We combine deep knowledge of this race's demands with your recent training, then build a plan with you that progresses as you do.
Beina integrates directly with your existing tools to understand your current fitness, and synchronise your planned sessions.
Intervals.icuWhat a Great Mansfield Outdoors 25 km plan targets
Typical sessions
25 km with 500 m of climbing
Time on feet and fatigue resistance
Fuelling and pacing for the whole event
What your weeks look like
Typical sessions
Long runs that build time on your feet
Tempo and threshold sessions to hold race pace
Back-to-back weekend runs for fatigue resistance
Not a generic schedule
Typical sessions
Built from your current fitness and the time you actually have
Adapts every week as Beina learns how you respond
Syncs your sessions straight to Garmin and Wahoo
One clear next session, never a wall of spreadsheet
Entries open now
Get your Great Mansfield Outdoors 25 km plan.
7-day free trial, no card required.
Other races at Great Mansfield Outdoors
More events in May in Canada
Grand Prix of Grand BeachExpected Early May 2027 · Grand Marais→Hillbilly HustleExpected Mid May 2027 · Nanaimo→Classique CTB (Course Trail Bière)Expected Late May 2027 · Bromont→Rompin' RockwoodSat, 22 May 2027 · City of Saint John→Trail du Coureur des Bois de DuchesnaySun, 23 May 2027 · Sainte-Catherine-de-la-Jacques-Cartier→R3G3: Renfrew Rough Rider Griffith Gravel GrinderExpected Late May 2027 · Griffith→
