Enter the Dragon's Den
Half Marathon · 10K · 5K. A hand-crafted endurance experience by eDragon Productions — at Pearsall Park in San Antonio, Texas.
Choose your fire
Three Ways to Run
Whether it's your first 5K or your fastest half, we've built a distance for you.
5K Run
Perfect for first-timers, families, and the fast crowd looking to fly.
- Chip timed
- Ages 5+ welcome
- Medal & tech tee
10K Challenge
A rolling loop through the neighborhood — the sweet spot between speed and grit.
- Chip timed
- Age-group awards
- Medal & tech tee
Half Marathon
The full Dragon experience. Hills, views, and a finish line you'll never forget.
- Chip timed
- Aid every mile
- Medal, finisher tee, & swag
Excessive Heat Advisory — Race Saturday, Aug 15
Saturday Will Feel Like 100°F+
South San Antonio is running well above normal. With high humidity at dawn and open, exposed climbs at Pearsall Park, the heat index is expected to climb past 100°F before the last finisher. Treat this as a survival-and-finish day, not a PR day. Forecast is updated as race week develops — check the National Weather Service the night before.
Humid, near-dew-point air
Sun clears the treeline
Full exposure on the hills
Beat the heat
Your 48-Hour Prep Plan
What you do in the two days before the gun matters more than anything you do on course.
48 Hours Out — Thursday
- Start pre-hydrating now: 1/2 oz of water per lb of body weight daily.
- Add electrolytes (sodium 300–600mg per bottle) — plain water alone won't cut it.
- Cut alcohol completely; it dehydrates you for 24+ hours.
- Lay out light-colored, loose, sweat-wicking kit — no cotton.
24 Hours Out — Friday
- Grab your packet 12–5 PM at the Edragon shop so race morning is stress-free.
- Eat salty carbs at dinner; salt helps you hold onto fluid.
- Freeze two bottles overnight and pack a cooler with ice and a towel.
- Sleep early — heat tolerance drops hard on short sleep.
Race Morning — Saturday
- Drink 16–20 oz with electrolytes 90 minutes before your start.
- Sunscreen, hat or visor, and sunglasses before you leave the car.
- Reset your goal pace: add 30–90 sec/mile for heat and the hills.
- Walk the aid stations. Rejuvenation stations are every mile — use every one.
Stop If You Feel This
- Chills or goosebumps in the heat
- Stopping sweating / dry skin
- Dizziness, nausea, or confusion
- Headache with a racing heartbeat
Walk to the nearest rejuvenation station and flag a volunteer. Medical support is on course all morning — there is no shame in stopping.
On-Course Heat Rules
- Start conservative — negative splits are nearly impossible in this heat.
- Drink at every rejuvenation station (every mile), even if you don't feel thirsty.
- Ice under the hat and in the singlet at every stop keeps core temp down.
- Course closes early if conditions spike — respect volunteer instructions.
Don't forget your packet
Packet Pickup
Three ways to grab your bib, shirt, and swag. Chips are on your bibs, so bring your packet to the start line.
Edragon Productions Shop
Pearsall Park
- Half Marathon5:30 AM — 6:25 AM
- 10K5:30 AM — 6:50 AM
- 5K5:30 AM — 7:00 AM
Delivered to your door
Finisher's Reward
Earn the Dragon
Every finisher takes home our signature Dragon medal — cast in bronze, enameled in ember, built to be worn. It's more than metal; it's proof you faced the den.
The Course
Fast, scenic, unforgiving
Pearsall Park's Gruelling Hills serve up rolling terrain, real elevation, and sweeping views — fully supported with aid stations, medical, and a finish festival worth sticking around for.
Explore the courseRace Apparel
Wear the Fire
Custom-printed race apparel by eDragon Productions. Half Marathon finishers receive the official Dragon's Den finisher tee, and every entrant gets race-day swag.
Half Marathon Finisher Tee
Full-print Dragon's Den tee awarded to every half marathon finisher — front medallion, back E-Dragon Productions mark.
Race Singlet — Men's
Lava-forged race-day singlet — cut for speed, breathable in the Texas heat. Reserved for the first 100 Half Marathon registrants and paired with an eDragon running hat as a gift from eDragon Productions.
Race Singlet — Women's
Women's racerback cut in the same signature lava print. Limited to the first 100 Half Marathon registrants and includes the eDragon running hat gift.
Meet the Team
A word from the founders
The story behind eDragon Productions — why we build races for runners, by runners.
Race Preview
Relive the Dragon's Den
Highlights from previous years — the energy, the course, and the finish-line moments that define this race.
Race Recap
Scenes from the Den
A look at what happens when the horn sounds — sunrise miles, aid-station roars, and hard-earned medals.
Find the Start Line
Race location
Dragon's Den takes over Pearsall Park — home of the Gruelling Hills trail system — with wide-open start/finish space, free race-day parking, and gear-check at the line.
Registration is Open
Early-bird pricing ends soon. Lock your spot in the Dragon's Den.