Big's Backyard Ultra has been described as one of the most mentally and strategically complex races in the world.

The Edge of Possible: A Barkley Marathon Tale takes you deep inside the legendary Barkley Marathons, the world’s most elusive and punishing ultramarathon. Set in the unforgiving terrain of Frozen Head State Park, this film follows elite ultrarunner Harvey Lewis as he battles the course, his limits, and time itself. Halfway through, we meet Jasmin Paris, whose grit and endurance add another layer to this epic test of human resilience. With insights from race founder Lazarus Lake, past Barkley finisher John Kelly, Gary Robbins and others, this documentary is an unprecedented look at the fine line between ambition and impossibility.