The Madison Trifecta is the running of and completion of the Madison Duathlon, Madison Marathon, and Madison Triathlon all within a four-week time frame. As of the end of 2016, more people have orbited the moon than have completed the Madison Trifecta. It's the New Everest of the sporting world.

Just a reminder: If you're trying to find the registration for the other races, use the search bar on top of this page, key in the race of your choice, and you'll find the sign up page. We're still working on some link updates.

The Greater Yellowstone Adventure Series is a six-race series in Southwest Montana.

Beginning at 12:00 AM on January 1, 2017, online signup for the Madison Trifecta and the Double Marathon is open. The Madison Trifecta is the combination of the 6th Annual Madison Duathlon (July 9), the 10th Annual Madison Marathon (July 22), and the 6th Annual Madison Triathlon (August 6) all within a four-week time span of the summer of 2017. The Double Marathon is the 10th Annual Madison Marathon (July 22) followed by the 3rd Annual Big Sky Marathon the very next day (July 23).

For all other races and race categories, online sign up will begin at 12:00 Noon (MST) on March 1, 2017.

The dates of the races are:

22nd Annual Madison River Run - June 3

6th Annual Madison Duathlon - July 9

10th Annual Madison Marathon - July 22

3rd Annual Big Sky Marathon - July 23

6th Annual Madison Triathlon - August 6

Proposed Cycling Race - Late August / Early September

There are no refunds allowed for any reason. However, we will allow you to transfer your entry to anyone either online or as arranged by phone or email.