Important Update - April 15th
The 100 Mile Distance will open for registration on Monday, April 19th. It will be a little more limited than normal with hopes that we will eventually gain all of our spots for this race.
Being totally transparent, we are hoping to have a new, Point to Point 100 mile course that will run East to West while still finishing in Pine, AZ. That is our "A" goal.
In the event our agencies will not permit this change in 2021, we will continue with the current 100 mile course that is listed on our website that starts at the Pine Trailhead and finishes in the center of Pine, Arizona.
If you register, we ask for your patience this Spring as we work to confirm this detail but know that either course you run will be incredible.
In the meantime, you can register and get in for the 2021 Monster.
The 105K and 35K registrations are opening a little later in the month in hopes that we will have an answer on the 100 mile course which could affect the 105K route.
View our (favorable) withdrawal policy here
We have paused the registration for the MOG105K as we work through the final stages of the 100 miler with our permitting agencies- specifically the logistics of the point to point course. You can add your name to the waitlist without submitting a payment. Once we have all systems-go, you would get an invite to accept the invite (or decline without paying anything). If you have any questions, please email us: Noah@aravaiparunning.com. Thanks for your patience and support.
The Mogollon Monster 100 is a rugged, challenging trail race taking place about 90 minutes northeast of Phoenix, Arizona just outside the small town of Pine, Arizona. This is an advanced degree endurance race of 100 miles with the addition of a 105 kilometer race and a 35 kilometer race! The races navigate up, down, around and through the beautiful Mogollon Rim (Pronounced: mug-ee-yun or muggy-own by locals, we'll call it MOG100 to keep it simple.)
The Rim rises out from the earth 2,000 some feet for a span of 200 miles across Arizona and into New Mexico, defining much of the eastern part of the state. This Rim takes the race from elevations of 5,500 feet at the start to upwards of 7,900 feet at the top of the Rim, changing ecosystems along the way in distinct flora changes as the elevation changes switch the scenery from high Sonoran Desert to the largest contiguous Ponderosa Pine forest in the world.
The 100 mile race climbs the Rim in four separate locations spending a lot of miles along the Rim, on top of the Rim and the challenging climbs up and down. Expect to climb a total of 22,000 feet along the way in the 100 mile race never below 5,000 feet and never above 8,000 feet in elevation. While other races are certainly at higher elevations, and/or with more climbing, they certainly do not contain as rugged a terrain that is found on this course. This is a VERY technical course in many areas, specifically the Highline Trail, Donahue and the soon to be revered, Myrtle Trail. Coupled with the mileage, the terrain, the moderate elevation, and the Arizona sun, this race will certainly take it's toll on each runner.
As the race takes place in late September temperatures should be in the low 70's to 80's below the Rim but can be drastically lower (read: below freezing) on top of the Rim at night. Thunderstorms from the summer monsoon season in Arizona are still possible and with that comes major wind, lightning and flash flood rains. Snow is a possibility, if unlikely in the higher elevations of the course. For the most part we can expect sunny skies, great temperatures and the start of some great fall foliage, especially on top of the Rim with all the ash, oak, maple along the trails.
Hardrock 100 Qualifier
As the Hardrock Hundred was canceled in 2019 & 2020, the current qualifying race for the next Hardrock will be the 2019 & 2020 Mogollon Monster 100 Mile. This finish will go towards the 2021 Hardrock lottery. See additional details here: Hardrock 100 Qualifying Races
The Monster is NOT a Western States 100 qualifier.
Anything else you may need to know is located on the Mogollon Monster website! Information on the website includes: course maps, race day schedule, pacer & crew information, and more.
Race entries are non-refundable and non-transferable. For other options, please check out our Race Withdrawal Policy.
Ultra Trail du Mont Blanc Qualifying Race!
UTMB, A Mythical Race
The 2021 Mogollon Monster 100 mile race will award 6 points towards the 2022 UTMB races.
The 105K distance will award 4 points towards the 2022 UTMB races.
Qualifying for The Monster: The 100 mile distance is not an easy race and as such, all entrants will be required to have completed, at minimum, a 50 mile race or greater before race day.
Local time: 11:05 PM