Challenge yourself on one of Indiana's toughest and most beautiful single-track courses at the OPSF 50|50 in Poland on Saturday, March 21, 2026. This long-standing tradition, organized by the non-profit Indiana Trail Running Association, offers a 50-mile, 50k, 14-mile, or 10k adventure through the rolling hills and horse trails of Owen-Putnam State Forest. With a unique "lollipop" course design that is 90% single-track, the event is renowned for its demanding terrain and unpredictable early spring weather, providing a true test for trail runners.
As a cupless race requiring participants to carry their own hydration, it emphasizes self-sufficiency and environmental responsibility. With staggered start times, shuttle service for shorter distances, camping at the horse campground, and finisher medals for all, the event balances a low-key, community vibe with serious trail running credentials. Secure your spot early for this beloved Hoosier state classic that sells out quickly every year.
Mar 21, 2026
Distance — 50K
Type — Running
07:00
$105.00
Mar 21, 2026
Distance — 80.5K
Type — Running
07:00
$125.00
Mar 21, 2026
Distance — 22.5K
Type — Running
09:30
$65.00
Mar 21, 2026
Distance — 10K
Type — Running
10:00
$45.00
These values represent the 3-year monthly averages for March in Spencer.
Spencer is a small town in Central Indiana. It was founded in 1820, and covers less that 2 square miles of land. It is the seat of Owen County.
Read more launchExplore other exciting events happening in this same region.
location_on Owensboro, Kentucky, US
calendar_today Apr 04, 2026
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