Course
Lollipop loops in Owen-Putnam State Forest, starting and finishing at the Horse Campground. About 90 percent singletrack and horse trail with a few sections of fire road, over rugged ground where mud is expected. The 50 mile runs three full loops plus an eight-mile short loop, the 50K two full loops plus a 2.8-mile short loop, and the 10K a single loop. Two aid stations serve the main loop.
Key dates
- !RegistrationOpen now
- ★Race daySat 20 Mar 2027
About
OPSF5050 is a trail ultramarathon held in Owen-Putnam State Forest near Spencer, Indiana. Runners choose from four distances, from 10K up to 50 miles, across the forest's hilly, wooded ridgeline trails.
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DINO Trail Run Paynetown
Wooded trails along Lake Monroe at Paynetown
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Knobstone 50
Follows Indiana's toughest trail, the Knobstone
A confirmed date shows its day; a provisional one shows only its month, because we won't claim a day we don't have. This page is rebuilt every night from the RunCalendar catalogue.