Montana Marathons
Ultra Marathons

Montana Tourism
Event of the Year

The Madison Marathon
has been recognized as
the #1 in our state by
Vacation Home Rentals!

The 2015 dates for The Greater Yellowstone Adventure Series, the greatest sporting series in Montana, are set. Do one race, two races, or the best yet…. compete in all of them and earn a T.B.A. Award (Total Bad Ass).


4th Annual Madison Duathlon – Sunday, July 5
8th Annual Madison Marathon – Saturday, July 18
Inaugural Big Sky Marathon – Route to be determined - Sunday, July 19
4th Annual Madison Triathlon – Sunday, August 2
20th Annual Madison River Run – Existing route in Ennis – Labor Day Weekend

Not convinced that the Greater Yellowstone Adventure Series will change your life forever? Check out these videos which were produced in 2013 with the generous support of a grant from the Montana Department of Tourism:

All race registration will be on
The registration link will take you directly to our page on

Sign up early, book the best airfare deals possible, and plan on spending at least a week’s vacation in America’s Last Best Place…. Madison County, Montana.


The 4th Annual Madison Duathlon - Sunday, July 5, 2015
Bike: 14 miles, Run: 7 miles
First Leg of the Madison Trifecta

The Madison Duathlon (bike/run) started out as a natural expansion of a good idea (i.e. the Madison Marathon), but it quickly became a good idea on its own. It has grown in popularity every year from the inaugural race in 2012. Many duathletes who have competed in the Madison Marathon say they had more fun on the duathlon.


The 8th Annual Madison Marathon - Saturday, July 18, 2015
Full, Half, and Team (4 runners) Marathon Events

Second Leg of the Madison Trifecta
Since the inaugural race over Labor Day Weekend in 2008, the Madison Marathon has grown by leaps and bounds and has joined the ranks of American marathons that sell out each year. We have hosted runners from at least 40 states and several countries. Last year, nearly one-half of the runners came from outside of Montana which is pretty good considering we have just 200 slots open. For the past three years, we have capped out at 200 runners and we fully expect to cap out in 2015. Every year, the Madison Marathon hosts Marathon Maniacs and 50-Staters, and we also get runners who have made the Madison their first marathon along with many, many return runners (some for the 5th and 6th time).


The 4th Annual Madison Triathlon - Sunday, August 2, 2015
Olympic Distance Triathlon: Swim – 1,200 yards in Ennis Lake, Bike – 23 miles on Highway 287 from Ennis Lake to Harrison, Run – 6 miles from Harrison to Pony
Third and Final Leg of the Madison Trifecta
Like the duathlon, the Madison Triathlon was intended to be an extension of a good idea. It became, however, a good idea on its own as well as the genesis of the Madison Trifecta Sporting Series. Do all three! If you do all three events (the duathlon, marathon, and triathlon), you will be a T.B.A. More people have walked on the moon than have earned T.B.A. status.


NEW in 2015
The Inaugural Big Sky Marathon
The Second Longest Downhill Road Marathon on Planet Earth
The starting line is within the Beaverhead Deerlodge National Forest and the route runs on the Gravelly Range Road to the US Forest Service Gate and then on the Call Road to Varney Bridge Road near the Ennis Fish Hatchery (all gravel roads). Then, it runs along Varney Bridge Road to Highway 287 (pavement). From the turnoff onto Highway 287 to Ennis, it runs on Main Street to the finish line at Lion’s Club Park in Ennis. This is the very same route, just in reverse, used by runners/shuttles to get to the Madison Marathon.

The finish line for the full marathon is Lion’s Club Park in Ennis. The finish line for the Half Marathon will be 13.1 miles from the starting line (not yet determined). Though this route has not been carefully measured, this will likely be near the Ennis Fish Hatchery.


2015 Sponsors

This institution operates under a special use permit from the Beaverhead Deerlodge National Forest.
This institution is an equal opportunity provider.