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| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| Marsh Creek Sprint Aquabike (Individual) | AquabikeOpen water swim | Sep 19, 20277:30 AM | $119$139 after Dec 16, 2026 | – |
| Marsh Creek Sprint Triathlon (Individual) | Sprint TriathlonSwim 750 m · Bike 12.4 mi · Run 3.1 miOpen water swim | Sep 19, 20277:30 AM | $119$139 after Dec 16, 2026 | – |
| Marsh Creek Sprint Triathlon Relay | Sprint TriathlonSwim 750 m · Bike 12.4 mi · Run 3.1 miRelay or teamOpen water swim | Sep 19, 20277:30 AM | $169$189 after Dec 16, 2026 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
The Aquabike fee goes up to $139 on Dec 16, 2026.
Around September 19, Marsh Creek Reservoir typically runs about 74°F at the surface (71 to 78°F across 2011 to 2020). Wetsuits were legal every year at this date.
A model estimate from the USGS lake temperature model (daily surface temperatures for US lakes), not a measurement. Wetsuit cutoffs are USA Triathlon age-group rules. The race's own water temperature reading on race morning decides.
Online registration closes Sep 19, 2027, unless the race fills first.
Sunrise on race morning is at about 6:46 AM, and the Marsh Creek Sprint Aquabike (Individual) starts at 7:30 AM. The start sits about 540 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
675 Park Road, Downingtown, PA 19335
The pin marks the address the race lists, which is usually the start. Course maps are the organizers' own.
National lists computed from results, entry fees, course maps and water temperatures; they refresh through the day.
Aggregated from official results for Marsh Creek Sprint Triathlon. Individual finisher names are not stored here.
At the 2026 Marsh Creek Sprint Triathlon (Individual), the fastest tenth finished in 1:26:09 or better, the top quarter in 1:34:37, and half the field in 1:48:06; the last tenth came in after 2:13:06.
At the 2026 Marsh Creek Sprint Triathlon Relay, the fastest tenth finished in 1:21:08 or better, the top quarter in 1:31:50, and half the field in 1:38:39; the last tenth came in after 1:57:39.
At the 2026 Marsh Creek Sprint Aquabike (Individual), the fastest tenth finished in 1:02:16 or better, the top quarter in 1:05:25, and half the field in 1:15:21; the last tenth came in after 1:28:21.
| Age | Women | Men |
|---|---|---|
| Under 20 | 2:04:25 | 1:19:56 |
| 20-29 | 1:30:40 | 1:27:19 |
| 30-39 | 1:36:45 | 1:14:29 |
| 40-49 | 1:31:17 | 1:19:36 |
| 50-59 | n/a | 1:20:52 |
| 60-69 | n/a | 1:36:39 |
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 Marsh Creek Sprint Triathlon (Individual), the bike decided the most: the middle of the field lost about 9:30 to the top quarter there, 48% of the gap across the three legs.
Compared with a typical sprint triathlon in Pennsylvania, the median swim here was 3:47 slower, the bike 5:25 slower and the run 0:35 slower (swim lengths differ from race to race).
| Leg | Top 10% | Top 25% | Median | Slowest 25% |
|---|---|---|---|---|
| Swim | 13:40 | 15:57 | 18:43 | 21:41+ |
| T1 | 2:07 | 2:43 | 3:29 | 4:38+ |
| Bike | 41:26 | 46:12 | 52:05 | 58:53+ |
| T2 | 1:15 | 1:32 | 1:59 | 2:34+ |
| Run | 23:27 | 26:03 | 29:37 | 34:06+ |
Each column ranks finishers on that leg alone, from the race's published results. T1 and T2 are transitions.
Compared with a typical sprint triathlon in Pennsylvania, the median swim here was 1:36 slower, the bike 5:07 slower and the run 2:12 faster (swim lengths differ from race to race).
| Leg | Top 10% | Top 25% | Median | Slowest 25% |
|---|---|---|---|---|
| Swim | 14:34 | 15:32 | 16:32 | 20:26+ |
| T1 | 1:13 | 1:27 | 1:32 | 1:57+ |
| Bike | 40:51 | 44:28 | 51:47 | 54:46+ |
| T2 | 0:50 | 1:00 | 1:05 | 1:16+ |
| Run | 23:37 | 25:02 | 26:50 | 30:27+ |
Each column ranks finishers on that leg alone, from the race's published results. T1 and T2 are transitions.
About the same size since 2025.
All events combined, from official results.
From 2025 to 2026, the field went from 299 to 299 finishers, and the median time rose from 1:42:46 to 1:48:06.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2026 | 299 (same) | 1:48:06 | under 1:26:09 | 1:08:50 |
| 2025 | 299 | 1:42:46 | under 1:21:31 | 1:04:10 |
From each year's official results for the Sprint Triathlon; virtual options are left out.
Slower than most Pennsylvania sprint triathlons
The fastest quarter of the 2026 sprint triathlon field finished under 1:34:37, against 1:24:31 in a typical Pennsylvania sprint triathlon, so times here run 12 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 September 19 the day usually runs from 59°F at dawn to 78°F in the afternoon, with measurable rain on about 26% of days. Cold snaps dip to 53°F and hot years reach 83°F.
Based on 76 days within a week of the date over the last 6 years, from historical weather for the start area. Not a forecast.
What the organizers of Marsh Creek Sprint Triathlon cover on their registration page, in brief.
Shirt and medal
2027 Kinetic Cup Series: Race More, Earn More! Complete three or more 2027 Kinetic Multisports events to start earning qualifier rewards. Complete at least five events to qualify for Kinetic Cup Series scoring and awards! Stage 1 — Q3…
Awards
See what all the excitement was all about or find race photos and videos from prior races. Feel free to download and share on social media! 2026. MarshCreek Race Video. MarshCreek Awards Video. MarshCreek Pictures and Video on SmugMug…
Rules and FAQ
The Competitive Rules are intended to provide for the orderly and consistent administration of events sanctioned by USA Triathlon and are not designed to establish standards of care for the safety of participants or other persons. Every…
The cause
Be part of the great experience. Here are some comments from last year’s MarshMan Triathlon race. " This was my first triathlon and because of how well the race was put together, the event staff, the organizers, and the racers I will…
Organize this race? Add details or a correction
Staged out of Marsh Creek State Park, this race is located just west of Philadelphia, PA and minutes from the Turnpike. The time trial swim takes place in 500 acre Marsh Creek Lake and features a single loop, rectangular shaped swim course. The bike course is a beautiful, well paved, single loop 20k course that takes athletes through a mix of technical sections and long straightaways alongside trout streams and forests. The 5k run course is entirely within the park and has beautiful lake views and a good uphill at mile 1. There is a ton to see and do outside of the race with kayak rentals, great restaurants and rural, back country roads.