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This is an open water swim at Lake Murray.
From the organizer's own race information. Venues and rules can change from year to year; the race's current athlete guide decides.
Around October 3, Lake Murray typically runs about 78°F at the surface (74 to 84°F across 2011 to 2020). Wetsuits are usually legal, but in warmer years the water topped 78°F, when wearing one makes you ineligible for age-group awards.
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.
Lake Murray Public Park, Lexington, SC 29072
The pin marks the address the race lists, which is usually the start. Course maps are the organizers' own.
The 21-mile bike course climbs 746 feet, about 36 feet a mile: rolling.
| Course | Distance | Climbing | Terrain |
|---|---|---|---|
| 20.8 mi Cycling Route in Irmo, South CarolinaBike | 21 mi | 746 ft | rolling |
| The Dam Tri - Bike CourseBike, out and back | 21 mi | 967 ft | rolling |
| 3.8 mi Running Route in Irmo, South CarolinaRun | 3.8 mi | 81 ft | flat |
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 (GO Race Productions) for Dam Tri. Individual finisher names are not stored here.
At the 2026 Sprinternational Triathlon, the fastest tenth finished in 1:46:34 or better, the top quarter in 1:57:20, and half the field in 2:14:26; the last tenth came in after 2:48:17.
At the 2026 Aquathlon, the fastest tenth finished in 53:13 or better, the top quarter in 1:00:44, and half the field in 1:03:19; the last tenth came in after 1:07:47.
At the 2026 Aquabike, the fastest tenth finished in 1:19:58 or better, the top quarter in 1:23:48, and half the field in 1:33:53; the last tenth came in after 1:48:03.
| Age | Women | Men |
|---|---|---|
| 20-29 | 2:09:14 | 1:41:46 |
| 30-39 | 2:00:39 | 1:35:18 |
| 40-49 | 2:01:27 | 1:42:35 |
| 50-59 | 2:29:36 | 1:52:23 |
| 60-69 | n/a | 2:12:03 |
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 Sprinternational Triathlon, the bike decided the most: the middle of the field lost about 12:58 to the top quarter there, 53% of the gap across the three legs.
| Leg | Top 10% | Top 25% | Median | Slowest 25% |
|---|---|---|---|---|
| Swim | 14:06 | 17:06 | 19:35 | 22:06+ |
| T1 | 1:15 | 1:44 | 2:19 | 2:53+ |
| Bike | 57:30 | 1:03:11 | 1:11:07 | 1:17:46+ |
| T2 | 0:51 | 1:10 | 1:34 | 2:09+ |
| Run | 29:09 | 33:00 | 37:49 | 45:28+ |
Each column ranks finishers on that leg alone, from the race's published results. T1 and T2 are transitions.
| Leg | Top 10% | Top 25% | Median | Slowest 25% |
|---|---|---|---|---|
| Swim | 14:41 | 17:20 | 21:18 | 25:03+ |
| T1 | 1:35 | 2:07 | 2:23 | 2:54+ |
| Run | 32:58 | 35:05 | 39:55 | 44:42+ |
Each column ranks finishers on that leg alone, from the race's published results. T1 and T2 are transitions.
Up 73 percent since 2021.
All events combined, from official results.
From 2021 to 2026, the field went from 106 to 184 finishers, and the median time rose from 2:03:45 to 2:14:26.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2026 | 184 (+14%) | 2:14:26 | under 1:46:34 | 1:26:35 |
| 2025 | 161 (+9%) | 2:16:28 | under 1:45:50 | 1:31:25 |
| 2024 | 148 (-8%) | 2:12:37 | under 1:43:35 | 1:27:08 |
| 2023 | 161 (+38%) | 2:11:24 | under 1:48:03 | 1:24:10 |
| 2022 | 117 (+10%) | 2:08:39 | under 1:43:00 | 1:33:02 |
| 2021 | 106 | 2:03:45 | under 1:48:24 | 1:38:28 |
From each year's official results for the Triathlon; virtual options are left out.
What the organizers of Dam Tri cover on their registration page, in brief.
Schedule and packet pickup
PACKET PICK-UP: Friday, October 2, 2026 (4:00PM - 6:00PM). Outspokin' Bicycles Irmo. 7601 St. Andrews Road. Irmo, SC 29063. Saturday, October 3, 2026 (6:15 AM – 7:30 AM). Lake Murray Public Park (Event Site). 1821 North Lake Drive…
Course
Course Descriptions: The swim is one clockwise 1000 meter triangular loop. Wetsuits will most likely be allowed as water temperatures are typically in the low to mid 70s. Depending on the wind swimmers may encounter light to moderate chop…
Course
Course Maps, including the swim, can be found by clicking on the PDF Icon below. Bike Course - MapMyRun. Bike Course - Ride With GPS. Run Course - MapMyRun. 2025 UPDATED RUN COURSE. 2026 PARKING MAP.
Parking and travel
There is not a host hotel for 2021.
Rules and FAQ
To defer your registration to the following year, navigate to Profile > Upcoming Events > Manage Registration > Defer Registration. To claim a deferral from the previous year, navigate to your profile and use the Deferrals tab to start…
Rules and FAQ
To adjust parts of your registration such as category, navigate to Profile > Upcoming Events > Manage Registration > Questions on left hand side. To transfer to another event such as aquabike, aquathlon or relay team, navigate to Profile >…
Organize this race? Add details or a correction
NOTE: The venue for the Dam Tri has let us know they will not be able to host the event moving forward. We are working to find an alternate location and will update this page when that happens.
SWIM: 1000 Meters (Lake)
BIKE: 21 Miles
RUN: 6 Kilometers