50K
With just over 5000’ of climbing, the Grindstone 50k offers a challenging and scenic course combining gorgeous single track with some fire road running as you get a little taste of both 100k and 100-mile courses.
Race Category
Running Stones
Finals Access
Course Description
Starting at the picturesque Natural Chimneys, the 50k route begins with a gentle warm-up before challenging you with a brief yet intense ascent, leading you along the narrow single-track ridge of Narrow Back Mountain. As you descend the other side, brace yourself for the formidable climb up Wolf Ridge, eventually connecting to Timber Ridge. Stay left as you reach the summit of Sand Spring Mountain and follow the descent along Sand Spring Trail. Proceed to access the Tillman Trail via the Tillman forest access, where you'll conquer another climb over Narrow Back Mountain before arriving at Lick Run. Finally, exit the forest at Bear Trap and enjoy a smooth cruise back to the finish line, set against the backdrop of the towering limestone chimneys.
*Courses are subject to change.
GPX File
Download the 100 Mile course GPX file below. Remember to ALWAYS follow course markings on the day of the race, as there might be slight alterations from the Course Maps and GPX File.
Your recorded distance may vary from our reported distance by as much as +/- one mile due to your device recording interval, the terrain, and dense tree canopy cover.
Last updated: 06/30/2025
Revision History
- Added elevation data
