The VOID
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The Void
The Void is a 48 hour out and back ultramarathon run entirely inside an abandoned tunnel near Valley-Hi, PA. The course uses a 1.3 mile corridor inside Sideling Hill Tunnel; participants complete 63 out and backs for a total just under 160 miles. The tunnel has no interior lighting, so runners move repeatedly between light and darkness guided by their own headlamps.
The event emphasizes psychological and strategic elements as well as physical endurance. A physical Toll Ticket system limits how often a runner may leave the tunnel to access support; tickets are issued at check in and govern exits during the race. The Toll Ticket system is intended to shape planning, discipline, and decision making rather than to equalize competition.
Entry to the event requires an application reviewed by the race directors. Priority is given to applicants with demonstrated extreme endurance experience. The organizers recommend recent completion of at least one 100 mile ultramarathon, backyard ultra, FKT, or comparable extreme endurance event within three years of registration. The field is limited to 96 participants. The event is organized by ESTEA. Visit the organization's website for the most recent information.