The Mammoth Glen Rose, TX - 100K - 50K - 25K - 10K - 5K and Mighty Mammoth 1K Fun Run
- Date Sat 11th October 2025 - Sun 12th October 2025
- Time 7:00AM CDT
- Location Glen Rose, Texas
- Price Free - $165.30
- Races 7 races
- Distances Ultra, 10km, 5km, 1km
Event summary
Get ready to lace up your running shoes for The Mammoth Race, taking place from October 11th to 12th, 2025, in the beautiful Glen Rose, Texas! This exhilarating multi-distance trail running event invites participants of all ages and skill levels to embrace the stunning landscapes of the Hill Country at the expansive 1,000-acre Eco-Retreat of High Hope Ranch. With race distances ranging from a fun-filled 1K Mighty Mammoth Fun Run to challenging 100K, there’s something for everyone, including 50K, 25K, 10K, and 5K options.
The event kicks off early on Saturday at 7 AM, with well-marked trails featuring two scenic loops—3.3 miles and 7 miles—perfect for connecting with nature. Participants will enjoy generous cut-off times, aid stations approximately every 3.3 miles, and a post-race celebration complete with music, food, and refreshments. Plus, all finishers receive a stylish race shirt and medal, with special buckles awarded to the 100K finishers. Join us for an unforgettable weekend of adventure, camaraderie, and outdoor fun as we celebrate the spirit of running at The Mammoth Race
The event kicks off early on Saturday at 7 AM, with well-marked trails featuring two scenic loops—3.3 miles and 7 miles—perfect for connecting with nature. Participants will enjoy generous cut-off times, aid stations approximately every 3.3 miles, and a post-race celebration complete with music, food, and refreshments. Plus, all finishers receive a stylish race shirt and medal, with special buckles awarded to the 100K finishers. Join us for an unforgettable weekend of adventure, camaraderie, and outdoor fun as we celebrate the spirit of running at The Mammoth Race
Organiser's Description
Get ready for The Mammoth Race - Glen Rose FALL migration. This multi-distance trail run welcomes families and runners of all skill. Enjoy the Hill Country that surrounds this stunning ONE THOUSAND acre Eco-Retreat. e can't wait to see you out there!
The Mammoth - Glen Rose, TX is a multi-distance trail running event located on the trails High Hope Ranch and Eco-Retreat. Distances offered are 100K, 50K, 25K, 10K, 5K and The Mighty Mammoth 1K FUN RUN. There will be two sections of the course: a 3.3-mile loop and a 7-mile loop. Both loops combined equal a 10.3-mile lap. The event will run from 7 am on Saturday morning until 9 am on Sunday morning. The starting line and Main Race Hub will be the main lodge on the Ranch. There are two aid stations on course: Main lodge at the starting line, and Matazamo ranch house. Aid stations are approximately 3.3 miles apart.
RACE CATEGORIES:
* 100K - 26hr Cut-off time
* 50K
* 25K
* 10K
* 5K
* Mighty Mammoth 1K Fun Run - NON-CHIP TIMED EVENT.
RACE HIGHLIGHTS:
* Finisher Shirts and Medals
* Generous Cut Off times - Cut off time for 100K only!
* Finisher BUCKLES for 100K Ultra
* Scenic routes through pristine natural landscapes
* Well-marked trails and 'round the clock aid stations
* Exclusive sites for tent camping and boondocking (no hook-ups)
* Post-race celebration. Music, food and refreshments!
ADDITIONAL INFO:
* PETS ARE NOT ALLOWED. USATF sanctioned event policy does not allow for animals to participate in competitions.
* The Mammoth is an Enviro-Friendly Event - B.Y.O.B (Bring Your Own Bottle)
RAIN or SHINE. In the event of inclement weather that would threaten the safety of the racers, the event or courses may be altered or the event may be delayed or canceled.
RACE DAY SCHEDULE
* 100K - 07:00am
* 50K - 07:15am
* 25K - 07:30am
* 10K - 07:45am
* 5K - 08:00am
* 1K - 10:00am
CLASSIC SWAG
* All participants will receive a Mammoth Race OFFICIAL Race shirt and a Finisher's Medal.
* Finisher BUCKLES for 100K ULTRAS
AWARDS
* NO PLACE FINISHER AWARDS. BRAGGING RIGHTS ONLY
PACKET PICK-UP
* TBD
PARKING
* Price INCLUDES Entrance and Parking
OVERNIGHT CAMPING
* $10 per Vehicle. NOT included in registration. Max 6 people per site. PAYABLE AT THE GATE
REFUNDS/TRANSFERS
* Race Entry Fees are NON-REFUNDABLE, however TRANSFERS to another Person, Category or Mammoth Event are allowed.
COURSE MAPS - Coming Soon!
The Mammoth - Glen Rose, TX is a multi-distance trail running event located on the trails High Hope Ranch and Eco-Retreat. Distances offered are 100K, 50K, 25K, 10K, 5K and The Mighty Mammoth 1K FUN RUN. There will be two sections of the course: a 3.3-mile loop and a 7-mile loop. Both loops combined equal a 10.3-mile lap. The event will run from 7 am on Saturday morning until 9 am on Sunday morning. The starting line and Main Race Hub will be the main lodge on the Ranch. There are two aid stations on course: Main lodge at the starting line, and Matazamo ranch house. Aid stations are approximately 3.3 miles apart.
RACE CATEGORIES:
* 100K - 26hr Cut-off time
* 50K
* 25K
* 10K
* 5K
* Mighty Mammoth 1K Fun Run - NON-CHIP TIMED EVENT.
RACE HIGHLIGHTS:
* Finisher Shirts and Medals
* Generous Cut Off times - Cut off time for 100K only!
* Finisher BUCKLES for 100K Ultra
* Scenic routes through pristine natural landscapes
* Well-marked trails and 'round the clock aid stations
* Exclusive sites for tent camping and boondocking (no hook-ups)
* Post-race celebration. Music, food and refreshments!
ADDITIONAL INFO:
* PETS ARE NOT ALLOWED. USATF sanctioned event policy does not allow for animals to participate in competitions.
* The Mammoth is an Enviro-Friendly Event - B.Y.O.B (Bring Your Own Bottle)
RAIN or SHINE. In the event of inclement weather that would threaten the safety of the racers, the event or courses may be altered or the event may be delayed or canceled.
RACE DAY SCHEDULE
* 100K - 07:00am
* 50K - 07:15am
* 25K - 07:30am
* 10K - 07:45am
* 5K - 08:00am
* 1K - 10:00am
CLASSIC SWAG
* All participants will receive a Mammoth Race OFFICIAL Race shirt and a Finisher's Medal.
* Finisher BUCKLES for 100K ULTRAS
AWARDS
* NO PLACE FINISHER AWARDS. BRAGGING RIGHTS ONLY
PACKET PICK-UP
* TBD
PARKING
* Price INCLUDES Entrance and Parking
OVERNIGHT CAMPING
* $10 per Vehicle. NOT included in registration. Max 6 people per site. PAYABLE AT THE GATE
REFUNDS/TRANSFERS
* Race Entry Fees are NON-REFUNDABLE, however TRANSFERS to another Person, Category or Mammoth Event are allowed.
COURSE MAPS - Coming Soon!
Races
-
100K Ultra Trail Run
Incl. $10.30 Fee & T-Shirt
Sat 11th October 2025 (7:00AM CDT)
$165.30
-
50K Trail Tun
Incl. $7.90 Fee & T-Shirt
Sat 11th October 2025 (7:15AM CDT)
$122.90
-
25K Trail Run
Incl. $6.10 Fee & T-Shirt
Sat 11th October 2025 (7:30AM CDT)
$91.10
-
10K Trail Run
Incl. $4.90 Fee & T-Shirt
Sat 11th October 2025 (7:45AM CDT)
$69.90
-
5K Trail Run
Incl. $4.30 Fee & T-Shirt
Sat 11th October 2025 (8:00AM CDT)
$59.30
-
The Mighty Mammoth 1K Fun Run
Incl. $2.50 Fee & T-Shirt
Sat 11th October 2025 (10:00AM CDT)
$27.50
Ages 11 and under. Adults RUN FREE! Up to TWO with each child registration. Non Chipped timed event. -
PACER - 100K Ultra Trail Run
Sat 11th October 2025 (7:00AM CDT)
Free
The Mammoth Glen Rose, TX - 100K - 50K - 25K - 10K - 5K and Mighty Mammoth 1K Fun Run
