
San Antonio, United States of America · Sunday 14 June 2026
ALL VIRTUAL EVENTS ARE NOW CLOSED! We invite you to join us for the 3rd AnnualTexas Sun Showdown Half Marathon, Relay & 5k Three great options: Want a challenge? Run the Half Marathon. Want to get a team together to relay? Grab your friends, find your team shirts or costumes! You can also run the 5K solo. Participants receive a Texas finisher medal, an awesome Texas theme shirt and delicious Texas barbecue food post race. TIME LIMIT FOR THE HALF MARATHON IS 4 HOURS. Relay Info: You will be prompted to join an existing Relay Team or create a new Relay Team during the registration process. Registration fee is a per person fee. All team members must register separately. Relay Categories: Open (All male, all female, or co-ed, any age) Masters (All male, all female, or co-ed, ages 40 ) Super Masters (All male, all female, or co-ed, ages 50 ) Mixed X (3 female, 1 male, any age) Mixed Y (3 males, 1 female, any age) Military Packet Pickup Info: Pre-Race Packet Pickup-Saturday June 13th 11-4 PM IRUN Race Day June 15th McAllister Park Pavilion #2 from 6-7:30 AM 13298 Buckhorn Rd, San Antonio, TX 78247 Schedule of Event 7:15AM HALF MARATHON AND 2-PERSON RELAY START 7:20AM 4-PERSON RELAY START 7:30AM 5K START 8:30AM 5K AWARDS 9:45AM RELAY 1/2 MARATHON AWARDS 10:00 AM HALF-MARATHON AWARDS Race Routes : Half Marathon and 2-person relay (half marathoners will complete 2 loops) See Route Here 4-person relay route: See Route Here 5K: See 5K Route Here The Virtual Texas Sun Showdown 5K and Half Marathon are races that you can run or walk from any location and route. You get to run your own race, at your own pace, and time it yourself. Signup, download and print your race bib, complete the run and submit your results. When you submit your time, you will also be able to download, print and/or share your Finisher s Certificate. Complete your race and submit your results between: June 15, 2026 12:00am- June 30, 2026 11:59pm
Adjusted Time
1:40:47
Time difference: -4.2 minutes compared to a flat, road, temperate course.
Texas Sun Showdown Half Marathon, Relay & 5k is a half marathon held in San Antonio, United States of America, scheduled for Sunday 14 June 2026. The course is run on road surface with 0m of total elevation gain, reaching a maximum altitude of 0m above sea level. For registration and full race details, visit the official Texas Sun Showdown Half Marathon, Relay & 5k website.
This is a very flat course with only 0m of total elevation gain across the full distance. The course ranges from 0m to 0m above sea level — a 0m elevation range that makes it one of the flatter races available. Runners targeting a personal best will appreciate the minimal climbing.
Texas Sun Showdown Half Marathon, Relay & 5k is run on road surfaces, which provide the fastest and most predictable conditions for marathon running. Road courses allow for consistent pacing and are typically the best choice for runners targeting a personal best time.
Our difficulty rating for Texas Sun Showdown Half Marathon, Relay & 5k is calculated using a model that combines elevation gain, temperature impact, and surface type. Use the difficulty calculator above to enter your target finish time and see exactly how many minutes this course would add or subtract compared to a perfectly flat, cool, road-based half marathon. Faster runners and slower runners are affected differently by the same course conditions, so the difficulty is personalised to your pace.
Looking for an easier marathon or a tougher challenge? You can also compare Texas Sun Showdown Half Marathon, Relay & 5k against other half marathons to find the right race for your goals.
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