Date
Sat, 29 May 2027
Start
08:00
Venue
Mansfield Outdoor Centre, 937365 Airport Rd, Mulmur, Ontario
Mansfield, Dufferin County
Countdown
May
A hundred kilometres made of four familiar 25 km laps. Not much climbing, so you can settle in and find your rhythm.
Key facts
0128-hour cut-off
02Four 25 km laps, so you pass the start each time
03Ranked by age group, sex and team size
Create a free training plan for the Great Mansfield Outdoors 100 km
7-day free trial, no card required
The course
One lap, on repeat
Mansfield · one lap
Distance100km
Total climb2,000m
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
Results
Course verified. Results not yet available.
Organiser
Training
Training for the Great Mansfield Outdoors 100 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 100 km plan targets
Typical sessions
100 km with 2,000 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
Hill reps and vert to prepare the climbs and descents
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 100 km plan.
7-day free trial, no card required.
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