The Thacher Park Trail Running Festival was created in 2014 in conjunction with the Thacher Park Centennial Festival. In 2015, we expanded the event to use more of the park's trails providing even more opportunity to see all that the park has to offer. We welcome you to enjoy the park's beautiful and tranquil scenery on a summer's day by participating in either the 10K, 13.1M, 26.2M or 50K.

All races start and finish at in the same place. Additionally, all races start together at the same time (8:30 AM) with a loop around the grass field between Horseshoe II Pavilion and Route 157 before heading out to the trails on the 'north' side of the park (towards Hailes Cave Pavilion.) All races share the same first 6 miles. The three longer races then go left to run along the escarpment trail, while the 10K runners bare right to head towards the finish area.

The 13.1M, 26.2M, and 50K continue on to the 'south' side of the park and complete a loop there. All three of these races run through the finish area at 13.1M. The 26.2M and 50K runners then repeat the entire course again. The 26.2M and 50K runners come through the finish at 26.2M, with the 50K runners then going back out for a 4.9 mile loop.