10mi, 20mi, 50k, 100k
March 2nd 2024
Dos Senderos Ultra
In 2022 race directors Erik Stanley and Joe Prusaitis decided it was time to put on a race together, and now we have one of the most challenging trail races in Central Texas. At Dos Senderos, the journey is not just about racing against the clock; it's about forging connections and building lasting memories with a community of like-minded trail enthusiasts. Exchange stories, tips, and encouragement with fellow runners, and make lifelong friendships as you share the milestones and triumphs of this incredible race. The camaraderie and support you'll find at Dos Senderos make it a truly extraordinary event that will leave you inspired and uplifted.
Register by 2/1 to guarantee your race swag
Start Times
100k 6:30 am
50K 7:30 am
20M 8:00 am
10M 8:00 am
Cutoff: We have a rolling 24 Hr cut-off for 100k (avg of 22 min/mile)
Packet Pickup
Thursday Feb 29th REI Austin Gateway
Race Day at Flat Rock Ranch in Comfort, TX
Saturday, March 2nd from 5:30-7:45am
Race Plans
Using a running coach can greatly enhance your performance and maximize your potential by providing personalized training plans, expert guidance, and invaluable support throughout your running journey.
We also offer semi-custom and fully customized race plans. All plans have been specially developed by our race director and tailored for the race, distance, and your experience level. Fully customized plans are available with 1:1 virtual coaching.
10mi - Map - 830 ft gain -Aid Station Info
20mi - Map - 1800 ft gain -Aid Station Info
50k - Map - 2650 ft gain - Aid Station Info
100k - 2x 50k loop -5300 ft gain - Aid Station Info
Course Maps
Location
Flat Rock Creek Rd, Comfort, TX 78013
This private cattle ranch is located in the Texas Hill Country just outside San Antonio and is about a 1:45 drive from Austin. The trails are single track with some double track that lead through typical hill country terrain, with spectacular views, hill climbs, long downhill sections, technical single track, and several creek crossings. While there may be creek crossings on occasion, Comfort has been in a drought for the last 4-5 years and will most likely be dry. Sorry, Pets are not allowed.
Parking
As you enter the ranch, you will immediately see an open gravel parking lot. If you drive more than 200 meters, then you’ve gone too far! The parking lot is a short walk from the start area. Please follow race signage.
Camping
Camping is available at Flat Rock Ranch for $15/night per person or $10/night per person for military, kids under 18, and adults 60 and over. You can pay upon entry to the property. Toilets and showers are available. There are no camping sites, but it is “open camping” meaning you can basically camp anywhere within the camping area boundaries.
More Info
Changing Race Distances (Last Day to Change is 2/28/2023)
You may change your race distance up to 2/28/2023 before the race date. Simply login to your Ultrasignup.com account and go to our race. Here are more details on how to change your race distance.
Transferring Bibs
We are allowing you to transfer your bibs! The deadline to do so is 1 month before race day.
Refunds/Credits New
Request a credit or deferral 120 days + from race day = 100% credit towards another race, 90 days + from race = 75% credit, 45 days + from race = 50% credit. 30 days + from race = 25% credit. less than 30 days = $0 credit. Credit is good for 1 year
We do not offer refunds.
Gear
Here’s a list of gear we strongly recommend each runner packs for an ultra in Comfort, Texas in March. These items will make your run easier and provide you with maximum protection. Most of you will have an even better list of your own.
Sunglasses
Sunscreen
Gloves
BodyGlide, or Sport-Shield, anti-friction product.
Apparel for a 30°F start and a 80°F finish.
Cap – some kind of head cover
Warm clothing for before start and after finish
Hydration belt, 20+ oz for between aid stations (critical)
Technical fiber (moisture wicking) or wool socks. NO COTTON
Post Race Food
9am-12pm Breakfast tacos from with meat/veggie options $4 ea or 2/$7
12-4pm Grilled Cheese/ Grilled Ham & Cheese with chips/drink $8
5-8pm Cheeseburger/ Veggie Burger with chips/drink $10
BYOB This year!
Pacers
Pacers are allowed to pace for the 100k runners only at the half-way point. Pacers will have vehicular access only to the S/F aid station at 18, 31, 49 and the finish.
Drop bags as also allowed and need to be brought to the start finish by 5:30a on race morning so we can distribute them to the proper aid station. Put your name and bib number on the bag.
Aid Stations
Aid stationswill be spaced anywhere from 3-7+ miles apart, so check that you can carry what you need in between.
Each aid station will have Skratch labs electrolyte hydration, water, pickles/ pickle juice, PB&J, trail mix, chips, gummy’s, a fruit item, soda, ginger-ale, salt tabs, and first aid kits.
Weather
Weather in Central Texas famous for being unpredictable. It is usually beautiful, but can be raining, sleeting, or hot.
In past years in March, it’s been warm (70’s F), cold (30’s F), wet, dry, windy, calm, and of course … rain, hail, sleet... See average for March in Comfort. It’s also been beautiful. Our aid stations and medical teams are on hand to keep you safe.
Campers should plan for all of the above.
Injury
If you are injured seriously, we will get you to expert medical care as soon as possible by land or air, depending on the urgency.
Medical Support
Many of our volunteers have received training in emergency medicine, and we will have EMS techs on hand.
Sponsors
Photos
Volunteer
Volunteers are great way to give back or get credit towards your future races. We rely on experienced mountain bikers, runners, and hikers as volunteers to help with trail setup, tear down and safety patrol. If you are good with a full day of trails (not terribly tough, but requires fitness and experience) it’s a fantastic place to ride. You must be able to take care of your own lodging, transportation, flats etc. and other gear. It sounds tough (and it can be), but volunteers love the work. No matter what your talent or capabilities, if you want to volunteer, we can find a job for you.
Communications
Volunteers will have radio’s to communicate between other aid stations and race staff.
Cell phone is coverage decent, but some lower spots won’t have coverage during the race.