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| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| Diamond in the Rough Olympic Aquabike (Individual) | AquabikeBike 0.9 mi | Jul 11, 20277:30 AM | $139$149 after Dec 16, 2026 | – |
| Diamond in the Rough Olympic Triathlon (Individual) | Olympic TriathlonSwim 1,500 m · Bike 26.8 mi · Run 6.2 miOpen water swim | Jul 11, 20277:30 AM | $139$149 after Dec 16, 2026 | – |
| Diamond in the Rough Olympic Triathlon Relay | Olympic TriathlonSwim 1,500 m · Bike 26.8 mi · Run 6.2 miRelay or teamOpen water swim | Jul 11, 20277:30 AM | $189$199 after Dec 16, 2026 | – |
| Diamond in the Rough Sprint Aquabike (Individual) | AquabikeOpen water swim | Jul 11, 20278:00 AM | $114$124 after Dec 16, 2026 | – |
| Diamond in the Rough Sprint Triathlon (Individual) | Sprint TriathlonSwim 750 m · Bike 8 mi · Run 3.1 miOpen water swim | Jul 11, 20278:00 AM | $114$124 after Dec 16, 2026 | – |
| Diamond in the Rough Sprint Triathlon Relay | Sprint TriathlonSwim 750 m · Bike 8 mi · Run 3.1 miRelay or teamOpen water swim | Jul 11, 20278:00 AM | $164$174 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 $124 on Dec 16, 2026.
Around July 11, the water at NOAA's Chesapeake City station typically runs about 83°F (81 to 86°F across 2016 to 2025). The water usually runs above 78°F at this date: wetsuits are allowed but make you ineligible for age-group awards.
Measured by the NOAA tide station nearest the race's listed location, about 20.7 km away; open beaches and sheltered bays nearby can differ by a few degrees. Wetsuit cutoffs are USA Triathlon age-group rules. The race's own water temperature reading on race morning decides.
Online registration closes Jul 11, 2027, unless the race fills first.
Sunrise on race morning is at about 5:45 AM, and the Diamond in the Rough Olympic Aquabike (Individual) starts at 7:30 AM. The start sits about 170 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
100 Marion Tapp Parkway, Perryville, MD 21903
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 Diamond in the Rough Triathlon. Individual finisher names are not stored here.
At the 2026 Diamond in the Rough Sprint Triathlon (Individual), the fastest tenth finished in 56:19 or better, the top quarter in 1:03:24, and half the field in 1:11:56; the last tenth came in after 1:31:35.
At the 2026 Diamond in the Rough Olympic Triathlon (Individual), the fastest tenth finished in 1:14:44 or better, the top quarter in 1:21:50, and half the field in 1:28:36; the last tenth came in after 1:50:29.
At the 2026 Diamond in the Rough Olympic Aquabike (Individual), the fastest tenth finished in 26:17 or better, the top quarter in 26:57, and half the field in 28:22; the last tenth came in after 38:37.
| Age | Women | Men |
|---|---|---|
| Under 20 | n/a | 48:33 |
| 20-29 | 1:09:14 | 1:04:56 |
| 30-39 | 1:10:13 | 57:04 |
| 40-49 | 1:11:32 | 56:09 |
| 50-59 | 1:09:33 | 55:14 |
| 60-69 | 1:09:26 | 1:03:36 |
| 70+ | n/a | 1:12:15 |
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 Diamond in the Rough Sprint Triathlon (Individual), the run decided the most: the middle of the field lost about 7:02 to the top quarter there, 55% of the gap across the legs.
Compared with a typical sprint triathlon in Maryland, the median bike here was 15:20 faster and the run 1:39 slower.
| Leg | Top 10% | Top 25% | Median | Slowest 25% |
|---|---|---|---|---|
| T1 | 1:10 | 1:24 | 1:42 | 2:08+ |
| Bike | 24:12 | 27:31 | 30:20 | 34:58+ |
| Run | 23:35 | 26:07 | 30:47 | 35:49+ |
Each column ranks finishers on that leg alone, from the race's published results. T1 and T2 are transitions.
At the 2026 Diamond in the Rough Olympic Triathlon (Individual), the run decided the most: the middle of the field lost about 9:03 to the top quarter there, 75% of the gap across the legs.
Compared with a typical olympic triathlon in Maryland, the median bike here was 54:59 faster and the run 1:13 faster.
| Leg | Top 10% | Top 25% | Median | Slowest 25% |
|---|---|---|---|---|
| T1 | 1:15 | 1:32 | 1:53 | 2:48+ |
| Bike | 23:49 | 24:54 | 26:58 | 28:54+ |
| Run | 43:53 | 48:35 | 53:54 | 1:02:09+ |
Each column ranks finishers on that leg alone, from the race's published results. T1 and T2 are transitions.
Down 13 percent since 2025.
All events combined, from official results.
From 2025 to 2026, the field went from 177 to 145 finishers, and the median time dropped from 1:27:31 to 1:11:56.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2026 | 145 (-18%) | 1:11:56 | under 56:19 | 47:39 |
| 2025 | 177 | 1:27:31 | under 1:09:59 | 54:38 |
From each year's official results for the Sprint Triathlon; virtual options are left out.
Faster than most Maryland sprint triathlons
The fastest quarter of the 2026 sprint triathlon field finished under 1:03:24, against 1:24:58 in a typical Maryland sprint triathlon, so times here run 25 percent faster.
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 July 11 the day usually runs from 73°F at dawn to 86°F in the afternoon, with measurable rain on about 39% of days. Cold snaps dip to 68°F and hot years reach 96°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 Diamond in the Rough Triathlon cover on their registration page, in brief.
Schedule and packet pickup
Be part of the great experience. Here are some comments from last year’s Diamond in the Rough Triathlon race. " Appreciate the communities support of this event on race day. Understand that it impedes traffic in the area and cars that…
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. Race Video. Awards Video. SmugMug Photos. 2025. Race Video. Awards Video. SmugMug Photos…
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…
Organize this race? Add details or a correction
Midway between Baltimore and Philadelphia, this race is staged out of beautiful Perryville Community Park in Perryville, Maryland which is truly a hidden gem, a diamond in the rough. Nestled on forested bluffs overlooking the top of the Chesapeake Bay this park makes for the epicenter of a great race. The swim takes place in the Chesapeake Bay and features an in water start off the dock. The Sprint bike course is a rolling out and back course while the Olympic bike course is technical with a mix of suburbia, rolling farm country and a fast, flat drag strip along River Road.