The ET takes place once a year at the RRCUS National Specialty. Any purebred ridgeback over two can compete, even if they are ridgeless. The 12 mile trial is broken up into three segments of 4 miles each, and each segment must be competed in 40 minutes or less. There is a 10 minute break between each segment. The dog is checked by a veterinarian before the run begins, during each break, and at the end. There is also a short obedience test before and after the run, to demonstrate that the dog will still perform and listen to its handler after completing a lengthy physical effort.

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Owners can either bike or run with their dogs and the dog can have multiple handlers during the run. To learn more: https://www.rrcus.org/Endurance-Trial