10k, 25k, 50k
March 1st 2025
Dos Senderos Ultra
Part of Texas Trail Championship
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
New Distances!
50K 7:30 am
25K 8:00 am
10K 8:00 am
Cutoff: We have a rolling 10 Hr cut-off for 50k (avg of 19:30 min/mile)
Packet Pickup
Thursday Feb 27th in Austin
Race Day at Flat Rock Ranch in Comfort, TX
Saturday, March 1st 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.
Aid Stations Info | Route with Aid Station PDF | Race Prep Guide
10k - 554’ gain | Map | cX Rating™️: 151.0 / Moderate
25k - 1782’ gain | Map | cX Rating™️: 181.8 / Hard
50k - 2687’ gain | Map | cX Rating™️: 223.2 / Hard
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.
Concessions
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!
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.