The 2025 Barkley Marathons has begun. An ultramarathon like no other, Barkleys is so tough only 20 runners have reached the finish line since its inception in 1986. Find all you need to know in our Barkley Marathons A-Z. 🔗 www.inov8.com/blog/post/a-... 📸 David Miller #BarkleyMarathons #BM100