Miles of grit. Mountains of glory.
The Greater Yellowstone Ultra Series…
The Beartooth Trail Festival
Coming August 2026
Adventure-worthy trails, rugged terrain, unreal views - and a festival where no one cares how much dirt is on your calves.
Our paperwork is taking a scenic route through the approval process.
When it reaches the finish line, we’ll launch full speed.
PC: Aunika Kleinfeldt
Beartooth 100
The Greater Yellowstone’s Beartooth 100 winds through the wild and remote mountain country of northwest Wyoming, showcasing the dramatic terrain that defines the Greater Yellowstone ecosystem. Starting near Clark, the course climbs high into the Absaroka Range on rugged singletrack and forest roads, with sweeping views of alpine peaks, glacial valleys, and endless sagebrush basins.
Runners will face over 21,000 feet of elevation gain across a mix of exposed ridgelines, pine forest, and rocky descents. This is a true mountain ultra — raw, beautiful, and humbling. Aid stations are spaced to test self-reliance, and weather can swing from sun to snow in a single day.
Every finisher earns their buckle the hard way — through grit, grace, and a journey that mirrors the wild heart of Yellowstone itself.
PC: Aunika Kleinfeldt
Beartooth 50
PC: Aunika Kleinfeldt
The Greater Yellowstone’s Beartooth 50 offers a bold taste of Wyoming’s wild mountain country — a demanding, scenic journey that captures the essence of the 100-mile course in half the distance. Runners will traverse alpine ridgelines, rolling forest trails, and rugged high-country roads with roughly 10,500 feet of elevation gain.
From sunrise over the Absaroka Range to winding descents through wildflower meadows, this course blends fast, runnable miles with punishing climbs and sweeping views. Designed for both seasoned ultrarunners and first-time mountain athletes, the 50-miler delivers the same raw beauty, community spirit, and challenge that define the Greater Yellowstone experience — just condensed into one unforgettable day.
Beartooth 32
The Greater Yellowstone’s Beartooth 32 is a rugged, scenic mountain adventure that delivers a powerful dose of Wyoming’s wild beauty in a single day. With roughly 6,000 feet of elevation gain, this course weaves through high-country trails, pine forests, and open ridgelines that overlook the Absaroka Range.
Challenging climbs and rolling descents reward runners with sweeping views and remote, peaceful miles rarely seen by road. Designed for those who crave a true backcountry trail experience without the full ultra distance, the 32-mile race captures the heart of the Greater Yellowstone — wild, untamed, and unforgettable.
PC: Aunika Kleinfeldt
Beartooth 18
PC: Aunika Kleinfeldt
The Greater Yellowstone’s Beartooth 18 is a fast yet formidable mountain challenge designed for adventurous runners ready to experience the spirit of ultrarunning without the ultra distance. With approximately 3,200 feet of elevation gain, the course combines runnable forest trails, moderate climbs, and sweeping ridgeline views that showcase the wild beauty of the Yellowstone region.
Whether it’s your first mountain race or a tune-up for something bigger, the 18-miler offers the same breathtaking terrain, strong community, and rugged Wyoming character that define the Greater Yellowstone experience.
KIDS Beartooth
One Mile
PC: Greg Wise
The Greater Yellowstone Kids 5K brings the next generation of trail runners into the adventure! This fun and family-friendly race features gentle trails and open scenery where kids can explore, run, and be cheered across the finish line.
Every participant receives a finisher medal and a big dose of encouragement from our volunteers and racers. It’s a celebration of perseverance, play, and the joy of running wild in the mountains.