Zach Bitter sets a World's Best for 100 miles off road at Tunnel Hill. 12:08:36!

Zach Bitter will be the guest speaker at Tunnel Hill 2026!

America’s premier 100 miler will shed some light on what it takes to become even better at your ultra running distances. Zach won the 100 in 2018 with a then best world’s best (12:08:36) for off road. Meet and Greet the legend, and if things go according to plan, we’ll see him in action on the course battling for the win with the other elite runners!

Video interview of Zach after his historic run in 2018. Interview by Conor Holt.