Think Big Trail Challenge
South Williamsport, United States • 4 Oct 2026
Think Big Trail Challenge
The Think Big Trail Challenge is a trail running event held on the Williamsport Water Authority trails near 1600 Mosquito Valley Road. The event offers two measured trail distances and follows marked singletrack and access roads through forested and historic areas.
- 5K
- 10K
The 5K route begins on a gravel road, continues onto Remington Road, Shuler Woods Road and Shelterwood Trail, then returns via Remington Road to cross the Green Bridge. Runners follow the Aqueduct Trail to the Bluebird Trail at the Remington Ruins and finish on the Bluebird Trail.
The 10K follows the 5K course and extends farther along Remington Road onto the Pocowanache Trail, which includes a steeper ascent to a viewpoint before descending back to Remington Road. The course reconnects at the Green Bridge and finishes on the Bluebird Trail.
Terrain includes smooth singletrack, rocky sections, climbs and flowing descents. One aid station is located at the Green Bridge for participants in both distances. Registration opens on May 16, 2026. Proceeds benefit the Think Big Pediatric Cancer Fund and the event is held in memory of an individual. Awards are given by gender and age groups, and race swag is guaranteed for the first 200 registrants. Limited parking is noted and race day registration is available. Visit the organization's website for the most recent information.