Southwest 100


At over a mile high, the Southwest 100 will leave you breathless
5k, 10k, 13.1mi, 26.2mi, 52mi, 104mi
March TBD, 2023

Williams Andrade Friends.HEIC

Eco Trail Race

5k, 10k, 13.1mi, 26.2mi, 52mi, 104mi

This is your chance to experience the remote southwest. If you are looking for a challenging and iconic race with breathtaking views coupled with rich history, then this is the race for you.

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Join the Fun

As a Volunteer, you are the person that gives the runner the support and motivation to continue. We know how  important each of you are to the entire day and promise you a fun and rewarding experience.

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Great Opportunity

This is a great opportunity to share your company, brand and services with a large and targeted group. As a sponsor of one or more events, you can select from the multiple sponsorship levels available.

The Race

The Course

Nestled in the historic Davis Mountains, this race starts on the legendary San Antonio-El Paso Road in the heart of Fort Davis National Historic Site. In the 1800s this remote outpost was set up by the U.S. Army as a refuge for travelers making the 600 mile journey by horse or wagon train. It was also home to the famous Buffalo Soldiers.

From Fort Davis you'll climb a rocky, single track into the Davis Mountains as you enter Davis Mountains State Park. As the vast panorama opens up, you'll take in the thin mountain air at over a mile high.


For those that go into the night, you'll gaze at the same wide open, dark sky studied by the nearby McDonald Observatory.

Start and Finish Times

The Start and Finish will be located within Fort Davis National Historic Site.  

  • 5:00 am - 52 mi, 104mi start 

  • 7:00 am - Marathon start

  • 7:30 am - Half Marathon start

  • 8:00 am - 5k, 10k start

Race briefings begin promptly, 10 minutes prior to race start time, at the start line.

NOTE:  All races start at the scheduled time.  Late starts will not be accommodated.




  • 11:00 am - Marathon must start second loop

  • 12:30 pm - 52 milers must start second loop

  • 3:00 pm - 5k, 10k, Half Marathon, Marathon

  • 8:00 pm - 52 Mile cutoff


  • 9:30 am - 104 milers must start last loop

  • 3:00 pm  - Cutoff for 104 miler

Course Markings

Races are marked with in-ground flagging and directional signage for each distance. 



View park maps and explore the trails via the interactive map. 


View course maps

Course Difficulty 

6 = Moderate to Strenuous course with technical single track terrain, steep climbing, ample elevation gain and loss.


Aid Stations

Well stocked Aid Stations manned by passionate volunteers, provide

  • First Aid:  Band-Aids, Vaseline, and other basic first aid supplies

  • Food/Drink:  Water, electrolyte drinks, and various salty, sweet and savory snacks

  • Drop Bags: All racers in every distance can have a drop bag. Clearly mark the bag with your name and the aid station where you want the bag to be dropped. We recommend that you choose the start / finish aid station.


  • Start and Finish Area: Fort Davis National Historic Site

  • Davis Mountains State Park Interpretive Center

  • Davis Mountains State Park Primitive Equestrian Camping Area

  • Intersection of Sprawl Rd. and Sheep Pen Canyon Trail

*Some aid stations may be unmanned

Cupless Race

This is an environmentally friendly race and it is our goal to keep the trails litter free to preserve their beauty. 


Cups won't be supplied during this racing event.  Please bring your refillable water bottles and we will refill them at the aid stations.

Training / Coaching

At every level, proper training can help you prepare for success. Ultra Expeditions has certified coaches and offers individual and group training packages. Learn More >> 

Race Shirts, Medals and Awards

To guarantee a race shirt, register by March 9, 2022.


Finishers receive a beautiful, custom designed medal, based on availability.

EXCEPTION - The 104 mile finishers receive a custom made belt buckle. 

Winner Awards


Top Male and Top Female for each race. Awards will be emailed after the race ends.

Pictures and Video


FRIDAY – March 25, 2022

  • 4:00 - 6:00 pm     Packet Pick Up - at Prude Ranch

SATURDAY – March 26, 2022

  • 4:00 am         Venue opens at Fort Davis National Historic Site

  • 4:30 - 8am     Packet Pick Up

  • 4:30 am         52 mi, 104 mi drop bag drop off deadline

  • 5:00 am         52mi, 104mi start

  • 7:00 am         Marathon start

  • 7:30 am         Half Marathon start

  • 8:00 am         5k, 10k start

  • 11:00 am       Marathon must start second loop

  • 3:00 pm         Cutoff for 5k, 10k, Half Marathon, Marathon

  • 12:30 pm       52 milers must start second loop

  • 8:00 pm         Cutoff for 50 miler

SUNDAY – March 27, 2022

  • 9:30 am     104 milers must start last loop

  • 3:00 pm     Cutoff for 104 miler

NOTE:  Race briefings begin promptly, 10 minutes prior to race start time, at the start line. Racers may only register for each event up until that distances start time. Racers may only drop in distances prior to race start. If they choose to drop during the race they will receive a DNF.



Registration will remain open until the start of each distance - unless the race is Sold Out.

Early Registration Discounts

Sign up early to get the best pricing.

Last day for each price break is:

  • Best Discount - December 7, 2021

  • Good Discount - January 4, 2022

  • Standard Pricing - Race Day

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Parking, Lodging and Travel 

Park Entrance and Parking


Fort Davis National Historic Site, Fort Davis, TX 79734

PLEASE NOTE: Racers park entry fees are included with their registration. However, friends, family, spectators, and any other individual not registered to race will need to pay the park entry fee when entering the park.

Observe all parking signs and do not park illegally. The event is not responsible for violations, towing, damages or theft. The park may collect fees for entrance and/or parking that are not covered in race registration.  The park will be open for racers to arrive and leave.  Please pay at the Visitors Center if arriving after scheduled hours. Contact Fort Davis National Historic Site for more information.

Directions to the Start

The race starts at the:


Fort Davis National Historic Site

Fort Davis National Historic Site, Fort Davis, TX 79734



For all information on Fort Davis and the closest hotels visit: 



Camping is available at Davis Mountains State Park. For reservations or further information, please contact Davis Mountains State Park at 432.426.3337.

PLEASE NOTE:  The event and event organizers are not responsible for any missing or damaged property, or any accidents.


Presented by


Partner Sponsors

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Multiple package available. Get all the Sponsorship Package Details >>


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Thank you. We'll be in touch soon!