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Event Updates

Important Race Day Info





Date and Time

Saturday October 15, 2022



Dinosaur Valley State Park

1629 Park Rd 59, 

Glen Rose, TX 76043


Park Entrance

Opens at 6:30 AM. 


When to Arrive

We recommend that you arrive at least ONE HOUR BEFORE YOU WAVE TIME. Remember that you will have to enter the park, park your car, pick up your packet, attach your bib and timing chip, drop off your bags (optional) and make your way to the starting line.



Designated parking for Mammoth Race participants is available. Parking for all Racers will be to the RIGHT as you enter the park. Follow the signs to Race Parking Area. DO NOT PARK IN THE PARK STORE PARKING LOT.


Pre-Race Day Package Pick Up (encouraged) 


Race Day Package Pick Up 

Will begin at 6:45 AM in the Event Staging area of the Park located near the GIANT dinosaur models and Park Store.


Race Day Registration

Race day registration will be available for all races beginning at 7:00 AM


Start Times

Race Wave start times are scheduled as follows. Additional waves may be added to any race depending on number of RACE DAY PARTICIPANTS. Any Changes in start times will be announced on RACE DAY.

30K -    7:30 AM

15K -    8:00 AM

10K -    8:20 AM

  5K  -   8:40 AM


Bag Check

Bag Check will be available in the Event Staging Area


Fossil Fuel Stations - VERY IMPORTANT

The Mammoth is Eco-Friendly and supporting a Low Impact/Leave No Trace Race. Remember to B.Y.O.B (Bring your own bottle or bag). Hydration and nutrition stations will be available near the Race Start as well as throughout the courses (approximately every 2-3 miles). The infamous paper cup will be available in limited quantities at each station. Keep paper cups OFF the trail! Due to the nature of this TRAIL RUN, be prepared to run longer distances than usual between filling stations. 



The Mammoth at Dino Valley is an epic run with nature at its’ best (and gnarliest)! Expect natural and unmarked obstacles, loose rocks, water, steep climbs and declines, roots, trees, sand, grass, pavement, critters and anything else nature can throw at you. THERE IS A HIGH PROBABILITY FOR TWO LOW, BUT WET RIVER CROSSINGS. One at the beginning and one near the end. BE  PREPARED TO RUN WITH WET FEET! 


All the trails are well established and will be marked and blazed accordingly. To avoid getting lost, STAY ON TRAIL and pay attention to your trail markers. Mammoth Trail Crew and Park Staff will be well dispersed throughout the trails.


BASIC First Aid will be established at each FOSSIL FUEL STATION. Cellular coverage is marginal at best in many areas of the Park. Should you decide to carry a mobile phone with you, be aware that you may not have service. In the event of an emergency that requires immediate attention CALL 911 for dispatch (assuming you have service) to Dinosaur Valley State Park and/or notify the nearest Mammoth Trail Crew Member, or another member of the Mammoth Herd to communicate down the trail. Watch out for your fellow trail runner and let's keep the trails SAFE!



If you have any other questions CONTACT US at:

or Call: 817 707 6620


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