The Tevis Cup

The Tevis Cup, sanctioned by AERC,  is one of the more challenging endurance races--100 miles in one day through rough terrain from Squaw Valley to Auburn CA.  In the video below, you can review the entire course in 7 minutes.  In 2014,  over 9000 riders with a completion rate of 54%.  The winning ride took 13 hours and 50 minutes with 2 mandatory 1 hour rest stops and multiple vet checks.  Riders were almost exactly evenly divided between men and women. To be awarded a silver completion award, the ride must be finished within 24 hours and the horse must pass a final vet check.

If I remember correctly, John Parke and Remington competed in Tevis several times and made the vet check but did not meet the 24-hour deadline.