
The Atomic Multisport Event by Personal Best Racing is a triathlon and duathlon race on October 10, 2026 in Lenoir City, TN, with entry fees from $90 to $230.
From the Organizer
Location: TVA Melton Hill Dam area, directions below. Race walk through Friday at 6 PM at race site. Arrive at site Saturday no than 7 AM EST for ample time for parking, packet pickup and getting ready for event starting promptly at 8 AM EST.
PACKET PICKUP & LATE REGISTRATION- PICTURE ID REQUIRED
Friday, Oct 9th - 5 PM - 6:30 PM at race site - see race location below.
Saturday - Race morning from 6:30 AM to 7:30 AM - at race site.
Registration is open race morning! Relays MUST come together to pick-up packets - no exceptions.
*Note- We do typically see heavy fog on occasions each year, so if it is too foggy, we will most likely delay until it clears for swimmer safety.
PARKING: Lower lots below dam - walk up hill to transition. No boat ramp access for racers. You can come to the Upper bath house lot to drop-off gear / bike but no parking. Parking is also available at the Overlook.
Half Iron info:
Note: Half Iron participants will have the option to upgrade to a Hoodie Sweatshirt during registration.
SWIM Course Map- START INFORMATION- The swim is a wave start from just outside the swim area at the dam end. The course will be a two loop rectangle finishing on the beach of the swim area. Swimmers will STAY IN WATER TO COMPLETE LOOP ONE. EXIT ONLY AT END OF SECOND LOOP. Keep buoys to your Right. Follow flagging to transition area. Water temp approx. 73.
Bike Courses will be modified from previous years, please stay tuned for a most amazing experience!
RUN Course Map-The Run course has been modified to stay around the dam. Runs will leave the campground/transition and to 58 then across the bridge and back down the other side of the dam to turnaround and head back. Half Iron will complete 2 loops.
Note for the Half Iron: we are instituting "cut off times" for the safety of participants, volunteers and support staff - limits noted are from the start of final starter: swim 1:15, bike 5:15 hours, run 1/2 way point 7:15 - finish line, music, etc. will be in place for all finishers - venue tear-down may begin depending on severe weather forecast, as in past years. Safety is our first priority.
Choose either the Sprint Triathlon 500 meter Swim, 18.6 mile Bike, and 5k run or Olympic Triathlon 1500 meter swim, 40k Bike and 10k run.
Sprint Maps: Swim BIKE RUN
Olympic Maps: - Note: Oly swim will have two additional buoys of different color to go around each loop - no exit after 1st loop.
The Sprint Duathlon will be a 5k Run, 18.6 mile Bike and a 5k Run.
--------
--------
--------
Personal Best Racing has enabled event insurance for your consideration in the event you are unable to compete. Please review this option during the registration process.
All Personal Best Racing triathlon events are sanctioned by USA Triathlon. When a race sanctions with USAT, it is required for each participant to purchase either a one-day license or annual membership in order to participate in said event. A one-day USAT license is $15 and an annual USAT membership is $50. Either can be purchased when signing up for the event. A youth one day or annual USAT license is $10. Click here to learn about your USAT benefits and where your member dollars go.
Personal Best Racing has a NO REFUND policy. Insurance is available during the registration of each event. Please take advantage of this option should you wish to insure your entry fees.
Event Shirts - Event shirts are NOT guaranteed to participants registering within 2 weeks of each event. Please register prior to 2 weeks prior to guarantee your race shirt.
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
75°
Typical Low
50°
Chance of Rain
25%
Based on US Climate Normals data from Lenoir City, 2 mi from the venue.
Host City
City Elevation
792 ft
Nearest Airport
TYS
McGhee Tyson Airport · 14 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 The Atomic Multisport Event by Personal Best Racing, put it on the calendar, and turn “someday” into a start date.
79
Days to train
Enter your email and we'll send more your way.
From Endurance Grid
This race spans more than one sport — here’s a guide to each, so you can understand what’s involved and decide if it’s the right fit. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
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.
Run, bike, run. The multi-sport format without the swim. Two disciplines, one race — a great bridge between running and triathlon.
Coming Up
Secret City Sprint Triathlon
14 miles away
K-Town on the River Triathlons
19 miles away
Fall Creek Falls Half Iron, Olympic & Calfkiller Sprint Triathlons
65 miles away
Mighty Marlins Kids Triathlon at the Cansler YMCA
23 miles away
Plan your trip
Coming from out of town? There's more to Lenoir City 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 Lenoir CityFrequently Asked Questions (FAQs)
The Atomic Multisport Event by Personal Best Racing
Oct 10, 2026