OPSF 50/50 Trail Race Challenge
Trail in United States, Poland
About
Indiana's toughest trail race with 10k, 14 mile, 50k and 50 mile options through Owen-Putnam State Forest featuring rugged, muddy single-track and horse trails with significant elevation gain.
Catering & aid stations
Pre-packaged food and drink only at aid stations and start/finish; items are for runners only. Dropping from the race requires notifying the start/finish timer or an aid station timer.
Pacers
This is a cupless race requiring all runners to carry 20 oz of water. 50-mile and 50K runners will complete multiple loops; 14-mile and 10K runners complete single counter-clockwise loops. Start waves are staggered with 50K at 7:00 a.m., 14-mile at 9:30 a.m., and 10K at 10:00 a.m.
Results
View official resultsRoute maps
What's included in entry
- Race entry
- Pre-packaged food and drink at aid stations
FAQ
What are the cutoff times?
50K: Aid B at 4:00 p.m., Aid A at 4:30 p.m., finish at 5:00 p.m. 50-mile: Aid B at 8:00 p.m., Aid A at 9:30 p.m., finish at 10:00 p.m.
Are pets allowed on course?
No pets are allowed on the course.
Is this a cupless race?
Yes, it is a cupless race; all runners must carry 20 oz of water.
Last updated: Jun 6, 2026, 12:18:47 AM
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