At over a mile high, The Southwest 100 will leave you breathless.

5k, 10k, Half Marathon, Marathon, 52mi and 104mi

March 27-28, 2021

The Southwest 100

The Race

5k, 10k, Half &

Full Marathons, 52mi, 104mi 

Eco Region:  Mountains

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.


Call for Volunteers

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!


Multiple Packages

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.


Please be sure to read this important information before attending the race.     

Read Now >>

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. This remote outpost in the 1800s was set up by the U.S. Army as a refuge for travelers making the 600 mile journey by horse or wagon train through hostile Indian country. It was also home to the famous Buffalo Soldiers.


From Fort Davis racers will climb through rocky single track further into the Davis Mountains as they enter Davis Mountains State Park. As vast panoramas open up, racers will take in the thin mountain air at over a mile high. 


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

If you are looking for an iconic race with breathtaking views coupled with rich history, then this is the race for you.

Start and Finish Times

The Start and Finish will be located within Fort Davis National Historic Site.  It is recommended that racers arrive by Friday evening to attend the race briefing at 6:00 pm at the Fort Davis High School auditorium.

  • 5:00 am - 104mi & 52mi start 

  • 7:00 am - Marathon start

  • 7:30 am - Half Marathon start

  • 8:00 am - 5k & 10k start

Race Briefings:  Begin promptly, 20 minutes prior to race start time, at the start line.

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



SATURDAY – March 27, 2021

  • 11:00 am - Marathon must start second loop

  • 1:30 pm   - 52 milers must start second loop

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

  • 9:00 pm   - 52 Mile cutoff

SUNDAY – March 28, 2021

  • 11:00pm   - 104 milers must start last loop

  • 5:00   pm  - Cutoff for 100 miler

Course Markings

The race will be marked with in ground flagging and color coordinated directional signage for each race 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.









Results available on race day.

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: For distances of 50 miles and above racers are allowed to place drop bags at aid stations. Drop bags will need to have the aid station clearly marked on them and placed in the designated location at the start/finish area by the cutoff time. Drop bags will be returned to the start/ finish area as the course is picked up. Please see itinerary


  • 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. Contact us for more information.

Race Shirts, Medals and Awards

Everyone registered will receive a Southwest 100 race shirt if they register by March 5, 2021.


Finishers of the 5k, 10k, 13.1mi, 26.2mi, 52mi, and 104mi will receive beautiful, custom designed medals based on availability. 100 mile finishers will 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


SATURDAY – March 27, 2021

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

  • 4:30 - 8am     Packet Pick Up/Registration opens

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

  • 5:00 am         104mi & 52mi 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

  • 1:30 pm         52 milers must start second loop

  • 9:00 pm         Cutoff for 50 miler

SUNDAY – March 28, 2021

  • 11:00  am     104 milers must start last loop

  •  5:00   pm     Cutoff for 100 miler

NOTE:  Race briefings begin promptly, 20 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.


Online registration is quick and easy.



Registration is open

Saturday, March 27, 2021 - RACE DAY

4:00 am - Registration will remain open until the start of each race.

Early Registration Discounts

Sign up early to get the best pricing.

  • Best Discount - Before December 7, 2020

  • Good Discount - Before December 31, 2020

  • Standard Pricing - After December 31, 2020



Be part of the fun and volunteer.  We promise you a great time.


All of our volunteers receive discounts toward future races and enjoy free food, beverages and parking.

There are opportunities to man aid stations, registration and help at the start and finish lines.

Contact us for more information.  Or sign up now.

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.


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.

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: 



Sponsorship Opportunities

There are multiple sponsorship levels available. 

Title Platinum, Gold, Silver, Bronze

Get all the Sponsorship Package Details.  

Learn more >>



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