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The Start and Finish is at Christmas Circle in Borrego Springs, CA.
The course is comprised of 2 loops – an 18-mile loop and a 4-mile loop. Competitors will race the 18-mile loop from their start until approximately 2 hours before the finish, then they will begin racing on the 4-mile loop until they finish. All racing is on open roads shared with motor vehicle traffic. For specific details see the official race rules in the Race Resources section below.
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