
Atomic Kids Fall Triathlons is a triathlon race on September 26, 2026 in Oak Ridge, TN, with an entry fee of $35.
From the Organizer
Come join this youth event of triathlon hosted by National Fitness Center for kids ages 2-14! Register for a choice of 3 races:
Long Sprint - 8:00 am start - 100 yard swim/3.0 mile bike/1 mile run
Mid Sprint - 8:45 am start - 50 yard swm/1.5 mile bike/.5 mile run
Tadpole Sprint - 9:20 am start - 25 yard swim/.75 mile bike/.5 mile run
Ages 2 to 14, can do any race based on distance and start time. For the tadpole sprint, the kids can watch the first race to get an example of how it's done. They are allowed to make use of water wings or a floatation device to help them "get their feet wet" in the sport of triathlon. The smaller kids may also use training wheels in the shorter distance.
Finisher medal for each participant, age group awards for Long and Mid sprint.
The swim will take place in the pool at the National Fitness Center in Oak Ridge at 750 Briarcliff Ave. The bike route will go out to Fairbanks road turn left, to Jefferson Middle School and turn around in the looped parking lot and then head back to transition. The sprint race does 2 laps. Run course goes out to Laboratory Dr and loops back around for sidewalk route back to Home Depot entrance back to finish line at National Fitness Center Parking lot. 2 loops for longer distance. The tadpole bike course will remain solely in the parking lot in a blocked-off section for safety and parental support. The run will follow the same course as the longer race, only with an escort if needed.
Events
Weather
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
80°
Typical Low
58°
Chance of Rain
27%
Based on US Climate Normals data from Oak Ridge Asos.
Host City
City Elevation
809 ft
Nearest Airport
TYS
McGhee Tyson Airport · 22 mi
Time Zone
Eastern Time
From Endurance Grid
Line up lodging and travel early to lock in your race weekend.
Race Location
Your Next Start Line
Every finish line starts with a single decision. Claim your spot at Atomic Kids Fall Triathlons, put it on the calendar, and turn “someday” into a start date.
65
Days to train
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From Endurance Grid
Endurance Grid is here to help you understand the sport, decide if it’s the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
Three sports, one race — swim, bike, run in sequence, with transitions that are a discipline of their own.
Open water, open roads, and competition with yourself. Cross the finish line knowing what it took to get there.
Swim, bike, run — back to back. The sprint distance makes it far more accessible than most people think. Three sports in one race means three movements to train and race day never gets monotonous.
Coming Up
Secret City Sprint Triathlon
2 miles away
K-Town on the River Triathlons
19 miles away
Super Sprint Triathlon
64 miles away
Fall Creek Falls Half Iron, Olympic & Calfkiller Sprint Triathlons
70 miles away
Plan your trip
Coming from out of town? There's more to Oak Ridge than race day. We'll help you line up nearby lodging, flights, a rental car, and things to do so you can make the most of your racecation.
Plan your trip to Oak RidgeFrequently Asked Questions (FAQs)
Atomic Kids Fall Triathlons
Sep 26, 2026