Registration for the next edition has not opened.
We earn a small commission when you register through this link, at no cost to you. Details
870 W. Malaga Road, Williamstown, NJ 08094
The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.
Aggregated from official results (JLD Event Management and Timing) for Autumn Lake Triathlon. Individual finisher names are not stored here.
At the 2026 Triathlon, the fastest tenth finished in 1:24:13 or better, the top quarter in 1:31:26, and half the field in 1:40:34; the last tenth came in after 2:11:24.
At the 2026 5K Run, the fastest tenth finished in 26:55 or better, the top quarter in 29:16, and half the field in 33:49; the last tenth came in after 44:48.
At the 2026 Aquabike, the fastest tenth finished in 54:08 or better, the top quarter in 57:25, and half the field in 1:04:26; the last tenth came in after 1:16:02.
| Age | Women | Men |
|---|---|---|
| Under 20 | n/a | 2:07:34 |
| 20-29 | 1:40:34 | n/a |
| 30-39 | 1:32:37 | 1:19:16 |
| 40-49 | 1:40:32 | 1:24:13 |
| 50-59 | 1:37:16 | 1:36:31 |
| 60-69 | n/a | 1:28:52 |
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 Triathlon, the bike decided the most: the middle of the field lost about 6:06 to the top quarter there, 43% of the gap across the three legs.
Compared with a typical sprint triathlon in New Jersey, the median swim here was 7:37 slower, the bike 1:37 slower and the run 1:53 slower (swim lengths differ from race to race).
| Leg | Top 10% | Top 25% | Median | Slowest 25% |
|---|---|---|---|---|
| Swim | 13:10 | 15:03 | 17:07 | 20:14+ |
| T1 | 2:33 | 3:03 | 3:44 | 5:00+ |
| Bike | 38:39 | 41:24 | 45:17 | 51:32+ |
| T2 | 2:05 | 2:30 | 3:08 | 4:04+ |
| Run | 23:55 | 27:47 | 30:03 | 36:10+ |
Each column ranks finishers on that leg alone, from the race's published results. T1 and T2 are transitions.
Compared with a typical aquabike in New Jersey, the median swim here was 8:03 slower and the bike 2:18 slower (swim lengths differ from race to race).
| Leg | Top 10% | Top 25% | Median | Slowest 25% |
|---|---|---|---|---|
| Swim | 12:20 | 13:41 | 16:06 | 18:51+ |
| T1 | 2:37 | 2:44 | 3:11 | 4:51+ |
| Bike | 36:46 | 41:58 | 43:10 | 44:43+ |
Each column ranks finishers on that leg alone, from the race's published results. T1 and T2 are transitions.
Down 22 percent since 2025.
All events combined, from official results.
From 2025 to 2026, the field went from 145 to 112 finishers, and the median time rose from 1:39:48 to 1:40:34.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2026 | 112 (-23%) | 1:40:34 | under 1:24:13 | 1:12:38 |
| 2025 | 145 | 1:39:48 | under 1:22:16 | 1:08:59 |
From each year's official results for the Sprint Triathlon; virtual options are left out.
Slower than most New Jersey sprint triathlons
The fastest quarter of the 2026 sprint triathlon field finished under 1:31:26, against 1:18:50 in a typical New Jersey sprint triathlon, so times here run 16 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.
What the organizers of Autumn Lake Triathlon cover on their registration page, in brief.
Rules and FAQ
Refund Policy. An optional registration fee reimbursement plan is offered at the time of registration. In the event you cannot participate, there will be no refunds UNLESS you have purchased the optional registration fee reimbursement plan…
Organize this race? Add details or a correction
The Autumn Lake Triathlon begins with a 0.4 mile swim in a clean, spring-fed lake in the heart of Williamstown, NJ. The 13 mile bike ride is flat and fast and includes roads with large bike lanes. The 5K run will take place on the property of Autumn Lake Winery and will take you through trails (hard packed dirt, some grass, sand, and loose dirt) around two lakes and through the vineyard.