19 Years and Still Running Strong!!!!
Congratulations to our 2025 Athletes!!!
Race Dates for 2026!
15th Annual Madison Triathlon
15th Annual Madison Duathlon
7th Annual Madison Ultra 50
19th Annual Madison Marathon
10th Annual Tour de Gravelly
The mission of the Greater Yellowstone Adventure Series is to invite athletes, explorers, and adventurers from around the world to the high mountains of Southwest Montana and provide them with the penultimate race experience.
Twenty years from now you will be more disappointed by the things you didn't do than by the ones you did. So throw off the bowlines, sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.
Mark Twain
These Ain’t No Pansy Ass City Races
Greater Yellowstone Adventure Series LLC 411 South Third Street - PO Box 1173 Ennis, MT 59729 Race Director Contact: Sam Korsmoe - sam@yespi.net
It’s Time To Go
Race Director finally running his own race
The First Two Miles
Ouch!
It’s All About Public Land
Please watch
July 19, 2026
July 11, 2026
July 12, 2026
Date: TBA
July 11 & 12, 2026
Date: TBA
Double Marathon Weekend
July 12, 2026
12th Annual Big Sky Marathon
July 18, 2026
30th Annual Madison River Run