Grit, endurance, temporary loss of sanity. You might need all of these if you want to attempt Grindstone. If you want to finish, well, just keep in mind this is, without a doubt, the hardest 100 miler east of the 100th meridian. Now that you’re hooked, Grindstone is going to be an incredible adventure for each and every entrant. From the beautiful start/finish location at Camp Shenandoah to the monster climbs and the solitude of single track ridge running, you just can’t beat Grindstone… but you can try! Come and join us for a wonderful event and experience what this 100 mile course has to offer you. It will be an experience you’ll never forget! Grindstone is event #4 in the Beast Series