Date
Sat, 20 Mar 2027
Start
07:00
Venue
Horse Campground, Owen-Putnam State Forest, Poland, Indiana
Poland, Clay County
Countdown
March
A proper 50K that repeats the course twice, then tacks on a short 2.8-mile loop to finish. Familiar ground by lap two, which helps when the legs tire.
Key facts
01Carry 20 oz of water at all times; it's a cupless race
02Two full loops, then a 2.8-mile finishing loop
Create a free training plan for the OPSF 50/50 Trail Race Challenge 50 km
7-day free trial, no card required
The course
One lap, on repeat
Poland · one lap
Distance50km
Start · finishOne lap · elevation
0 kmDrag map to rotate21.4 km
Weather
Mid-March, Poland
12°CTypical high
0°CTypical low
-10°CColdest in 20 years
36%Days with rain
Highs around 12°C and lows around 0°C, but it has dropped to -10°C. Rain on 36% 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
OrganiserIndiana Trail Running Association (ITRA)
Websiteopsf5050.com
Instagram@indianatrailrunning
Running since1993
Training
Training for the OPSF 50/50 Trail Race Challenge 50 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 OPSF 50/50 Trail Race Challenge 50 km plan targets
Typical sessions
50 km
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 OPSF 50/50 Trail Race Challenge 50 km plan.
7-day free trial, no card required.
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