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 - $197.10
- Races 7 races
- Distances Ultra, 10km, 5km, 1km
Last chance to enter
Race day is fast approaching
Event summary
Join us for an unforgettable weekend at The Mammoth Race in Glen Rose, Texas, from October 11 to 12, 2025! This vibrant multi-distance trail running event invites families and runners of all skill levels to experience the stunning landscapes of the Hill Country at the beautiful High Hope Ranch and Eco-Retreat. Choose your challenge from a variety of race distances including the exhilarating 100K, 50K, 25K, 10K, 5K, or the fun-filled Mighty Mammoth 1K Fun Run!
The event kicks off bright and early at 7 AM on Saturday and continues through to 9 AM on Sunday, featuring well-marked trails and round-the-clock aid stations to keep you energized. Runners can look forward to scenic routes that wind through pristine natural landscapes, generous cut-off times for the 100K, and exciting finisher medals and shirts for all participants. Plus, the 100K finishers will even earn a coveted finisher buckle! After conquering the trails, join us for a lively post-race celebration with music, food, and refreshments. Don’t miss out on this exhilarating experience—mark your calendars and get ready to embrace the thrill of The Mammoth Race!
The event kicks off bright and early at 7 AM on Saturday and continues through to 9 AM on Sunday, featuring well-marked trails and round-the-clock aid stations to keep you energized. Runners can look forward to scenic routes that wind through pristine natural landscapes, generous cut-off times for the 100K, and exciting finisher medals and shirts for all participants. Plus, the 100K finishers will even earn a coveted finisher buckle! After conquering the trails, join us for a lively post-race celebration with music, food, and refreshments. Don’t miss out on this exhilarating experience—mark your calendars and get ready to embrace the thrill of 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 levels. Enjoy the Hill Country that surrounds this stunning ONE THOUSAND acre ranch. We 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 [https://www.highhope.eco/]. Distances offered are 100K, 50K, 25K, 10K, 5K and The Mighty Mammoth 1K FUN RUN. There will be two sections of the course: a 3.5-mile loop and a 7-mile loop. Both loops combined equal a 10.5 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: the main lodge at the starting line, and Matazamo ranch house. Aid stations are approximately 3.5 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
* RACE DAY on site
PARKING
* Price INCLUDES Entrance and Parking
OVERNIGHT CAMPING
* $10 per PERSON. 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 - Viewable HERE [https://www.mammothrace.com/glenrose-tx]
The Mammoth - Glen Rose, TX is a multi-distance trail running event located on the trails High Hope Ranch and Eco-Retreat [https://www.highhope.eco/]. Distances offered are 100K, 50K, 25K, 10K, 5K and The Mighty Mammoth 1K FUN RUN. There will be two sections of the course: a 3.5-mile loop and a 7-mile loop. Both loops combined equal a 10.5 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: the main lodge at the starting line, and Matazamo ranch house. Aid stations are approximately 3.5 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
* RACE DAY on site
PARKING
* Price INCLUDES Entrance and Parking
OVERNIGHT CAMPING
* $10 per PERSON. 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 - Viewable HERE [https://www.mammothrace.com/glenrose-tx]
Races
-
100K Ultra Trail Run
Incl. $12.10 Fee & T-Shirt
Sat 11th October 2025 (7:00AM CDT)
$197.10
-
50K Trail Tun
Incl. $9.70 Fee & T-Shirt
Sat 11th October 2025 (7:15AM CDT)
$154.70
-
25K Trail Run
Incl. $7.30 Fee & T-Shirt
Sat 11th October 2025 (7:30AM CDT)
$112.30
-
10K Trail Run
Incl. $5.50 Fee & T-Shirt
Sat 11th October 2025 (7:45AM CDT)
$80.50
-
5K Trail Run
Incl. $4.90 Fee & T-Shirt
Sat 11th October 2025 (8:00AM CDT)
$69.90
-
The Mighty Mammoth 1K Fun Run
Incl. $3.10 Fee & T-Shirt
Sat 11th October 2025 (10:00AM CDT)
$38.10
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
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Location
High Hope Ranch and Retreat Center, Glen Rose, 76043, TX, United States
The Mammoth Glen Rose, TX - 100K - 50K - 25K - 10K - 5K and Mighty Mammoth 1K Fun Run
