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Mountain RATS

Quick facts

Distance Marathon

About Mountain RATS

Come celebrate fall in the mountains with a trail running challenge! An exciting day of festival fun and adventure on the trails near Eagle, Colorado. With the start/finish line right in the heart of Eagle’s new fall festival, Septemberfest, friends and family can enjoy themselves while you push yourself in the rugged mountain race. 

Afterwards, relax with a beer, hot meal, or just sit and listen to live music. Racers can choose from a Heavy Half, Marathon or 50K. Held in conjunction is the Septemberfest 5K, a scenic, flat and fast course in Eagle, Colorado. All ages and abilities are welcome; you can walk, jog, run or race. Same start/finish as our Mountain RATS trail runs – invite your family and friends to enjoy some miles around town while you explore the trails. 
Proceeds will benefit The Cycle Effect, a local non-profit with the mission to empower girls through mountain biking.



  • 50km


  • 42.195km

Half Marathon

  • 21.098km


  • 5km


Aid Stations

We will have nine aid stations located throughout the 50K course, six for the marathon and four for the half (at approximately five-mile intervals).

Award Medals

Finisher’s mementos will be handed to you as you cross the finish line and awards will be given out at our Awards Ceremony.


Parking will be on the streets near the start/finish and surrounding the Septemberfest.


Aid Stations will have: gels, potato chips, peanut butter and jelly rolls, chocolate, bananas, ice water and Tailwind. Cups will not be provided. Please bring your own cup!

Mountain RATS Route Map

Mountain RATS Route Map


717 Sylvan Lake Rd, Eagle, CO 81631, USA

The race information has been found on the official website of the event or through publicly available sources. Always refer to the official website the latest race information. Please let us know if any data is wrong or missing, by emailing us.