The Atomic Multisport Event
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Event overview
The Atomic Multisport Event by Personal Best Racing takes place on Saturday, October 10, 2026, at the TVA Melton Hill Dam area in Lenoir City, TN (1700 Melton Hill Dam Rd, 37771). The event includes multiple triathlon, duathlon, aqua-bike and relay options, with on-site packet pickup available Friday evening at the race site and on race morning. Registration is open on race morning. Relays must pick up packets together and a picture ID is required. The race is sanctioned by USA Triathlon; one-day and annual USAT licenses are available at registration.
Race formats, courses and logistics
Distances offered include:
- Sprint Triathlon: 500 meter swim, 18.6 mile bike, 5k run
- Olympic Triathlon: 1500 meter swim, 40k bike, 10k run
- Sprint Duathlon: 5k run, 18.6 mile bike, 5k run
- Half Iron Triathlon and Aqua-Bike options
Half Iron swim: wave start from near the dam, two-loop rectangle, finish on the swim area beach; swimmers must stay in water to finish loop one and may exit only at the end of the second loop. Keep buoys to the right. Water temperature is listed as approx. 73. The run course stays around the dam; the Half Iron run completes two loops. Bike courses will be modified from previous years. Parking is in lower lots below the dam with a walk uphill to transition; the upper bath house lot allows gear drop-off only. Heavy fog may cause swim delays for safety. The event has a no-refund policy and offers optional event insurance. Event shirts are not guaranteed for registrations within two weeks of the event. Visit the organization's website for the most recent information.
