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| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| Calfkiller Sprint Aqua Bike | AquabikeOpen water swim | Aug 21, 20277:00 AM | $75$80 after Aug 4, 2027 | – |
| Calfkiller Sprint Triathlon - Age Group | Sprint TriathlonOpen water swim | Aug 21, 20277:00 AM | $80$95 after Jan 6, 2027 | – |
| Calfkiller Sprint Triathlon - Athena 165+ | Sprint TriathlonOpen water swim | Aug 21, 20277:00 AM | $80$95 after Jan 6, 2027 | – |
| Calfkiller Sprint Triathlon - Clydesdale 220+ | Sprint TriathlonOpen water swim | Aug 21, 20277:00 AM | $80$95 after Jan 6, 2027 | – |
| Calfkiller Sprint Triathlon Relay | Sprint TriathlonRelay or teamOpen water swim | Aug 21, 20277:00 AM | $120$135 after Jan 6, 2027 | – |
| Half Iron Distance Triathlon - Age Group | Half Iron TriathlonOpen water swim | Aug 21, 20277:00 AM | $120$145 after Jan 7, 2027 | – |
| Half Iron Distance Triathlon - Aqua Bike | AquabikeOpen water swim | Aug 21, 20277:00 AM | $105$110 after Jan 7, 2027 | – |
| Half Iron Distance Triathlon - Athena | Half Iron TriathlonOpen water swim | Aug 21, 20277:00 AM | $120$145 after Jan 7, 2027 | – |
| Half Iron Distance Triathlon - Clydesdale | Half Iron TriathlonOpen water swim | Aug 21, 20277:00 AM | $120$145 after Jan 7, 2027 | – |
| Half Iron Distance Triathlon Relay | Half Iron TriathlonRelay or teamOpen water swim | Aug 21, 20277:00 AM | $195$220 after Jan 7, 2027 | – |
| Olympic Triathlon - Age Group | Olympic TriathlonSwim 1,500 m · Bike 24.9 mi · Run 6.2 miOpen water swim | Aug 21, 20277:00 AM | $95$110 after Jan 6, 2027 | – |
| Olympic Triathlon - Aqua-Bike | AquabikeOpen water swim | Aug 21, 20277:00 AM | $80$95 after Jan 6, 2027 | – |
| Olympic Triathlon - Athena 165+ | Olympic TriathlonOpen water swim | Aug 21, 20277:00 AM | $95$110 after Jan 6, 2027 | – |
| Olympic Triathlon - Clydesdale 220+ | Olympic TriathlonOpen water swim | Aug 21, 20277:00 AM | $95$110 after Jan 6, 2027 | – |
| Olympic Triathlon Relay | Olympic TriathlonRelay or teamOpen water swim | Aug 21, 20277:00 AM | $170$185 after Jan 6, 2027 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
The Aquabike fee goes up to $80 on Aug 4, 2027.
Online registration closes Aug 21, 2027, unless the race fills first.
Sunrise on race morning is at about 6:04 AM, and the Calfkiller Sprint Aqua Bike starts at 7:00 AM. The start sits about 1,820 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
10821 Park Road, Spencer, TN 38585
The pin marks the address the race lists, which is usually the start. Course maps are the organizers' own.
The 56-mile bike course climbs 2,265 feet, about 41 feet a mile: rolling.
| Course | Distance | Climbing | Terrain |
|---|---|---|---|
| 1936 m Swimming Route inSwim | 1940 m | ||
| 1504.2 m Swimming Route inSwim | 1500 m | ||
| 55.5 mi Cycling Route inBike | 56 mi | 2,265 ft | rolling |
| 24 mi Cycling Route in Pikeville, TennesseeBike | 24 mi | 827 ft | rolling |
| 13.7 mi Cycling Route inBike | 13.7 mi | 464 ft | rolling |
| 3.1 mi Running Route inRun | 3.1 mi | 179 ft | rolling |
| 518.9 m Activity Route inRun | 0.3 mi | 1 ft |
From the course maps the organizers publish on Ride with GPS and MapMyRun; climbing is the total gain the map reports. Courses can change between editions, so check the date on the map.
National lists computed from results, entry fees, course maps and water temperatures; they refresh through the day.
Aggregated from official results (Bald Eagle Events) for Fall Creek Falls Half Iron, Olympic & Calfkiller Sprint Triathlons. Individual finisher names are not stored here.
At the 2026 Calfkiller Sprint Triathlon - Age Group, the fastest tenth finished in 1:24:33 or better, the top quarter in 1:33:46, and half the field in 1:47:57; the last tenth came in after 2:17:13.
At the 2026 Olympic Triathlon - Age Group, the fastest tenth finished in 2:51:24 or better, the top quarter in 3:03:53, and half the field in 3:16:41; the last tenth came in after 4:06:29.
At the 2026 Half Iron Distance Triathlon - Age Group, the fastest tenth finished in 5:51:53 or better, the top quarter in 6:12:03, and half the field in 6:33:13; the last tenth came in after 8:09:32.
| Age | Women | Men |
|---|---|---|
| 20-29 | 1:45:31 | 1:29:32 |
| 30-39 | 1:47:22 | 1:25:10 |
| 40-49 | 2:01:25 | 1:19:57 |
| 50-59 | 1:47:57 | 1:19:14 |
| 60-69 | n/a | 1:33:39 |
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 2026.
At the 2026 Calfkiller Sprint Triathlon - Age Group, the bike decided the most: the middle of the field lost about 9:53 to the top quarter there, 49% of the gap across the three legs.
Compared with a typical sprint triathlon in Tennessee, the median swim here was 2:00 slower, the bike 5:19 slower and the run 6:17 slower (swim lengths differ from race to race).
| Leg | Top 10% | Top 25% | Median | Slowest 25% |
|---|---|---|---|---|
| Swim | 9:59 | 11:03 | 12:23 | 14:44+ |
| T1 | 4:08 | 5:19 | 6:47 | 8:26+ |
| Bike | 40:11 | 44:46 | 51:48 | 57:32+ |
| T2 | 1:04 | 1:23 | 1:47 | 2:44+ |
| Run | 25:51 | 29:46 | 34:42 | 41:56+ |
Each column ranks finishers on that leg alone, from the race's published results. T1 and T2 are transitions.
At the 2026 Olympic Triathlon - Age Group, the run decided the most: the middle of the field lost about 10:36 to the top quarter there, 41% of the gap across the three legs.
Compared with a typical olympic triathlon in Tennessee, the median swim here was 1:22 slower, the bike 3:58 faster and the run 6:55 slower (swim lengths differ from race to race).
| Leg | Top 10% | Top 25% | Median | Slowest 25% |
|---|---|---|---|---|
| Swim | 32:51 | 34:02 | 37:48 | 42:50+ |
| T1 | 4:44 | 5:25 | 6:19 | 7:39+ |
| Bike | 1:13:36 | 1:17:09 | 1:23:36 | 1:32:06+ |
| T2 | 1:16 | 1:33 | 2:10 | 2:56+ |
| Run | 54:03 | 1:00:33 | 1:08:25 | 1:17:43+ |
Each column ranks finishers on that leg alone, from the race's published results. T1 and T2 are transitions.
Down 23 percent since 2025.
All events combined, from official results.
From 2025 to 2026, the field went from 159 to 104 finishers, and the median time rose from 1:45:49 to 1:47:57.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2026 | 104 (-35%) | 1:47:57 | under 1:24:33 | 1:15:24 |
| 2025 | 159 | 1:45:49 | under 1:26:20 | 1:14:16 |
From each year's official results for the Sprint Triathlon; virtual options are left out.
Slower than most Tennessee sprint triathlons
The fastest quarter of the 2026 sprint triathlon field finished under 1:33:46, against 1:25:04 in a typical Tennessee sprint triathlon, so times here run 10 percent slower.
Compares the fastest quarter of each field, so walkers and first-timers do not skew it. It reflects the course and the field together: a flat course, cool weather, or a competitive crowd all make times faster.
Around August 21 the day usually runs from 67°F at dawn to 86°F in the afternoon, with measurable rain on about 21% of days. Cold snaps dip to 60°F and hot years reach 92°F.
Based on 90 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 Fall Creek Falls Half Iron, Olympic & Calfkiller Sprint Triathlons cover on their registration page, in brief.
Course
Tri Fall Creek Falls Half Iron, Olympic and Sprint COURSE DETAILS: Swim. -BUOYS ARE KEPT ON LEFT - 1.2 Mi Half Iron: one loop of ALL BUOYS – large triangle buoys will be at the far two turns by dam & one back by new lodge construction near…
Course
Sprint Swim Map. Sprint Bike Map. Sprint Run Map.
Course
Olympic Swim Map. Olympic Bike Map. Olympic Run Map.
Course
Half Iron Swim Map. Half Iron Bike Map. Half Iron Run Map.
Parking and travel
Click Here for Google Location.
Organize this race? Add details or a correction
The Fall Creek Falls Triathlons take place every year at the beautiful Fall Creek Falls State Park. The Olympic distance race began back in 2005 and races have expanded with the addition of Sprint and Half Iron distances.
Many folks ask about the race date for the upcoming year, so the triathlon will always be on the 3rd weekend every year. We have a standing date with Fall Creek Falls every year. Hope this helps with your planning and lodging arrangements.
See Menu bar on top for the Course Maps.
Calfkiller Sprint Triathlon - S 500 mtr. - B 22K - R 5K