With a secret application process, unknown start time and ever-changing course, the annual Barkley Marathons tempts runners to rural Tennessee to test their limits in a gruelling trail race that only saw 10 competitors make it to completion in its first 25 years.

Directors Annika Iltis and Timothy James Kane will participate in Skype Q&As on November 27, at 6:30 p.m. and November 29, at 8:45 p.m.

Co-presented by Outward Bound Canada.

FRI, NOV 27—DEC 3, select times

Tickets & showtimes: http://ow.ly/TXWPm