Monster Triathlon
About this race
Rather than end the multi-sport season with a bang, these athletes end their season with a SCREAM!
Monster Triathlon 2026 marks year 21 and will sell-out early with over 700 athletes! The distances are FAST for the experienced athletes and just right for the beginner.
The Swim has 50 meter lanes that are 9 ft wide, the bike is a two ( NEW ) or three loop course, and the run takes place on the beautiful Keller trails. The total distances are the following:
NEW SUPER SPRINT OPTION: TWO LOOP BIKE
Swim: 300 Meters
Bike: 10 Miles
Run: 5K
SPRINT OPTION: THREE LOOP BIKE
Swim: 300 Meters
Bike: 14.5 Miles
Run: 5K
Each event is a little different at the finish line. Some have live bands, but ALL of the events are filled with energy and WONDERFUL costumes which are ENCOURAGED! This is a great race to end your triathlon season!
WEATHER POLICY
In the event of inclement weather, the start time of this event may be delayed by up to 1 hour. Past this time, the event course may be shortened or altered to protect the participants.
If conditions turn unsafe, the event may be cancelled. Event changes and cancellations are at the discretion of the Race Director.
We always strive to produce a full and safe sporting event, but sometimes the weather conditions can affect those plans.
Considerable amount goes into planning a sporting event and we do so with the best intentions. Unfortunately, no one can control the weather and race directors are not the exceptions.
Our goal is to always produce a full event as scheduled and only modify these plans due to safety concerns some of which can be caused by weather conditions.
Thank you for your understanding of these policies and we appreciate your participation.
Pick your distance
Triathlon
Monster Triathlon Age Group (Three Loop bike)
The Monster Triathlon is a sprint race that sells out each year! At Monster, you will swim 300 meters at the Keller Natatorium indoor pool, bike 14.3 miles and run 3 miles. The run course is an out and back path on a beautiful wooded trail.
Monster Triathlon Athena (female 165lbs+) (Three Loop Bike)
The Athena division is for females 165lbs+. The Monster Triathlon is a sprint race that sells out each year! At Monster, you will swim 300 meters at the Keller Natatorium indoor pool, bike 14.3 miles and run 3 miles. The run course is an out and back path on a beautiful wooded trail.
Monster Triathlon Clydesdale (male 220lbs+) (Three Loop bike)
The Clydesdale division is for males 220lbs+. The Monster Triathlon is a sprint race that sells out each year! At Monster, you will swim 300 meters at the Keller Natatorium indoor pool, bike 14.3 miles and run 3 miles. The run course is an out and back path on a beautiful wooded trail.
Monster Triathlon Age Group (Two Loop Bike)
Monster Triathlon Athena ( female 165lbs) (Two Loop Bike)
Monster Triathlon Clydesdale (male 220lb) (Two Loop Bike)
Typical race-day weather
Based on 9 years of Open-Meteo archive data for this event's race dates in Keller, plus the 3 days either side.
The sun rises at 7:30 AM and sets at 7:00 PM local time (CDT) in Keller on October 11, 2026 — 11h 30m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
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Results — Monster Triathlon
Other races near Keller
Different organizers, within 40 miles, in the next three months
Monster Kids Triathlon
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Run With The Turkeys Trot
Santa Scurry 5K - Keller, TX
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 14 Keller events
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