
Marshall Mountain MARS-a-Thon is a road cycling race on September 19, 2026 in Missoula, MT, with an entry fee of $25.
From the Organizer
Introducing the First Annual Marshall Mountain MARS-a-Thon! This inclusive mountain bike race is all about FUN and generating support for the MARS mission! Missoula Adaptive Recreation and Sports’ mission is to enhance the quality of life for people with disabilities through recreational activities & advocacy.
The MARS-a-thon is about celebrating the excitement MARS brings to life every day — coming together to embrace summer in the mountains and celebrate our community that transforms lives in Missoula and the surrounding areas. This is a fundraising race! With the average Bowhead Handcylce starting at $18,000 base price, we hope to fundraise enough to purchase of new program equipment and support operations for MARS programs.
We are also celebrating the success of the Mission to MARS trail! This trail was a Missoula County Park project made possible through a collaborative effort between Friends of Marshall Mountain, Radius Trail Solutions, Missoula Mountain Bike Coalition, Missoula Adaptive Recreation and Sports along with support from many more local partners and dozens of volunteers. Thanks to all the folks who helped get this trail completed, Mission to MARS was named Best Adaptive Trail of 2025 by SingleTracks Mountain Bike News!
Join us on September 19th from 12 - 5pm at Marshall Mountain Park for a day filled with an inclusive mountain biking enduro race, friendship, local grub, prize giveaways, costume contest, and a well-earned celebratory drink at the after party!
Race Registration & Fundraising
The Competition
The Raffle
Come for the dirt, and stay for the hot dogs, beer, costume contest, raffle giveaways, and support our growing community of athletes of all abilities!
Read more about MARS programs and impact at our website: www.missoulaadaptiverec.org
NOTE: If you cannot afford the $25 donation to register, contact us below.
Weather
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
72°
Typical Low
43°
Chance of Rain
26%
Based on US Climate Normals data from Missoula 2 Ne, 3 mi from the venue.
Host City
Population
75,600
as of 2023
City Elevation
3,168 ft
Nearest Airport
MSO
Missoula Montana Airport · 4 mi
Time Zone
Mountain Time
From Endurance Grid
A mid-size host city. Enough lodging and amenities to keep race weekend easy, without big-city sprawl.
Race Location
Your Next Start Line
Every finish line starts with a single decision. Claim your spot at Marshall Mountain MARS-a-Thon, put it on the calendar, and turn “someday” into a start date.
22
Days to train
Enter your email and we'll send more your way.
From Endurance Grid
Endurance Grid is here to help you understand the sport, decide if it’s the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
Road cycling rewards pacing judgment and consistent time on your bike more than raw power. If you already ride regularly and can comfortably ride a few miles, you have a good starting base for most beginner-friendly events.
Built around sustained effort on a bike, exploring cities on the open road. Beginner distances create a great entry point into endurance sports.
Coming Up
Rangers Devo Cyclocross Team
6 miles away
Missoula Cyclocross
26 miles away
Dusty Cyclocross
9 miles away
Country Cross - MTCX Super Prestige #1 & #2
23 miles away
Marshall Mountain MARS-a-Thon
Sep 19, 2026