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| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| Aqua-Bike Half Iron Triathlon | AquabikeOpen water swim | Oct 10, 20267:45 AM | $180 | – |
| Athena Half Iron Triathlon - Female 165+ | Half Iron TriathlonOpen water swim | Oct 10, 20267:45 AM | $205 | – |
| Atomic Sprint Duathlon | Duathlon | Oct 10, 20267:45 AM | $105 | – |
| Clydesdale Half Iron Triathlon - Male 220+ | Half Iron TriathlonOpen water swim | Oct 10, 20267:45 AM | $205 | – |
| Individual Half Iron Triathlon | Half Iron TriathlonOpen water swim | Oct 10, 20267:45 AM | $205 | – |
| Relay Half Iron Triathlon | Half Iron TriathlonRelay or teamOpen water swim | Oct 10, 20267:45 AM | $280 | – |
| Atomic Olympic Triathlon - Athena 165+ | Olympic TriathlonOpen water swim | Oct 10, 20268:15 AM | $125 | – |
| Atomic Olympic Triathlon - Clydesdale 220+ | Olympic TriathlonOpen water swim | Oct 10, 20268:15 AM | $125 | – |
| Atomic Olympic Triathlon - Individual | Olympic TriathlonOpen water swim | Oct 10, 20268:15 AM | $125 | – |
| Atomic Olympic Triathlon Relay | Olympic TriathlonRelay or teamOpen water swim | Oct 10, 20268:15 AM | $165 | – |
| Olympic Aqua Bike | AquabikeOpen water swim | Oct 10, 20268:15 AM | $115 | – |
| Atomic Sprint Triathlon - Athena 165+ | Sprint TriathlonOpen water swim | Oct 10, 20268:30 AM | $105 | – |
| Atomic Sprint Triathlon - Clydesdale 220+ | Sprint TriathlonOpen water swim | Oct 10, 20268:30 AM | $105 | – |
| Atomic Sprint Triathlon - Individual | Sprint TriathlonOpen water swim | Oct 10, 20268:30 AM | $105 | – |
| Atomic Sprint Triathlon Relay | Sprint TriathlonRelay or teamOpen water swim | Oct 10, 20268:30 AM | $145 | – |
| Sprint Aqua Bike | AquabikeOpen water swim | Oct 10, 20268:30 AM | $105 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
Online registration closes Oct 10, 2026, unless the race fills first.
Sunrise on race morning is at about 7:38 AM, and the Aqua-Bike Half Iron Triathlon starts at 7:45 AM.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
1700 Melton Hill Dam Rd, Lenoir City, TN 37771
The pin marks the address the race lists, which is usually the start. Course maps are the organizers' own.
Aggregated from official results (Bald Eagle Events) for The Atomic Multisport Event by Personal Best Racing. Individual finisher names are not stored here.
At the 2025 Atomic Sprint Triathlon - Individual, the fastest tenth finished in 1:44:07 or better, the top quarter in 1:51:21, and half the field in 2:05:39; the last tenth came in after 2:38:48.
At the 2025 Atomic Olympic Triathlon - Individual, the fastest tenth finished in 2:51:56 or better, the top quarter in 3:06:26, and half the field in 3:19:32; the last tenth came in after 4:16:02.
At the 2025 Individual Half Iron Triathlon, the fastest tenth finished in 4:44:04 or better, the top quarter in 5:26:13, and half the field in 6:15:57; the last tenth came in after 6:50:27.
| Age | Women | Men |
|---|---|---|
| Under 20 | n/a | 1:41:36 |
| 20-29 | 2:06:06 | 1:48:56 |
| 30-39 | 2:07:44 | 1:40:21 |
| 40-49 | n/a | 1:49:21 |
| 50-59 | n/a | 1:46:50 |
| 60-69 | n/a | 2:00:49 |
Groups with fewer than five finishers are left out. Awards vary by race; check the race's rules.
Where a finish time would have placed in 2025.
Up 48 percent since 2021.
All events combined, from official results.
From 2021 to 2025, the field went from 79 to 107 finishers, and the median time rose from 2:03:29 to 2:05:39.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2025 | 107 (+88%) | 2:05:39 | under 1:44:07 | 1:30:43 |
| 2023 | 57 (+10%) | 2:00:01 | under 1:32:53 | 1:20:23 |
| 2022 | 52 (-34%) | 1:59:54 | under 1:39:47 | 1:27:41 |
| 2021 | 79 | 2:03:29 | under 1:36:19 | 1:29:10 |
From each year's official results for the Sprint Triathlon; virtual options are left out.
Around October 10 the day usually runs from 55°F at dawn to 75°F in the afternoon, with measurable rain on about 19% of days. Cold snaps dip to 46°F and hot years reach 81°F.
Based on 75 days within a week of the date over the last 5 years, from historical weather for the start area. Not a forecast.
What the organizers of The Atomic Multisport Event by Personal Best Racing cover on their registration page, in brief.
Course
Half Iron Swim Course. Atomic by PBR Half Bike | 55.8 mi Running Route on Strava. Atomic by PBR Half Run | 13.1 mi Running Route on Strava. Sprint Swim. Sprint Bike. Sprint Run. Olympic Swim (2 Loops). Olympic Bike. Olympic Run (NEW).
Organize this race? Add details or a correction
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.