The Atomic Multisport Event
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The Atomic Multisport Event
The Atomic Multisport Event takes place on 10/10/2026 at the TVA Melton Hill Dam area in Lenoir City, Tennessee. The weekend program includes multiple race formats: Half Iron, Olympic and Sprint triathlons, an Aqua-Bike option, a duathlon and relay categories.
Packet pickup and late registration require a picture ID and are offered Friday, Oct 9 from 5:00 PM to 6:30 PM at the race site and race morning from 6:30 AM to 7:30 AM. A race walk-through is scheduled Friday at 6:00 PM. Relays must pick up all team packets together.
Distances include:
- Sprint Triathlon: 500 m swim, 18.6 mi bike, 5 km run
- Olympic Triathlon: 1500 m swim, 40 km bike, 10 km run
- Sprint Duathlon: 5 km run, 18.6 mi bike, 5 km run
The swim uses a wave start from near the dam and is a two-loop rectangle with swimmers remaining in the water to complete the first loop and exiting only after the second loop; buoys are kept on the right. Olympic swim loops include two additional buoys of a different color. Bike courses have been modified from previous years. The run course stays around the dam; Half Iron participants complete two run loops.
Operational notes: organizers may delay starts if heavy fog compromises swimmer safety. Parking is available in lower lots below the dam and at the Overlook; the upper bath house lot is for drop-off only. Melton Hill Campground is immediately across the park access road. Event shirts are not guaranteed for registrations within two weeks of the event. The organizer has a no refund policy; optional event insurance is offered during registration. The event is sanctioned by USA Triathlon; participants must have a one-day license ($15), annual membership ($50), or youth license ($10). Visit the organization's website for the most recent information.
