The Void - Valley-Hi
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The Void
The Void is a 48 hour out and back ultramarathon held inside Sideling Hill Tunnel in Valley-Hi, PA. Runners complete 63 out and backs through a 1.3 mile corridor on pavement, totaling just under 160 miles. The course design deliberately emphasizes repetition and minimal external stimulus.
The tunnel has no interior lighting. Participants run and walk guided by personal headlamps while moving in and out of darkness for two days. The event emphasizes psychological endurance as much as physical distance: there is no scenery, no variation, and frequent turns between the tunnel ends.
The event uses a physical Toll Ticket system issued at check in. That ticket limits how often a runner may leave the tunnel to access support; the system is intended to make strategic planning and discipline part of the challenge.
Entry requires an application that will be reviewed by race directors. Priority is given to applicants with demonstrated extreme endurance experience. Organizers recommend completion of at least one 100 mile ultramarathon, backyard ultra, FKT, or a comparable extreme endurance event within three years of registration. The field is limited to 96 participants. Visit the organization's website for the most recent information.
