2025 - Diamond Mountain Triathlon
2025 distances
Triathlon
Triathlon (0.5mi/15mi/2mi)
0.5mi swim in Lake Welch 15 miles bike around Harriman Park (1 lap) 2 miles run on paved road with some gravel sections
Duathlon
Duathlon (2mi/15mi/2mi)
2 miles run on paved road with some gravel sections 15 miles bike around Harriman Park (1 lap) 2 miles run on paved road with some gravel sections
Junior Duathlon (2mi/15mi/2mi)
Starting with adults 2 miles run on paved road with some gravel sections 15 miles bike around Harriman Park (1 lap) 2 miles run on paved road with some gravel sections
Race-day weather
Conditions on September 21, 2025 — historical Open-Meteo data.
The sun rises at 6:42 AM and sets at 6:54 PM local time (EDT) in Stony Point on September 21, 2025 — 12h 11m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
Reviews
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2025 results — Diamond Mountain Triathlon
45 finishers across 2 distances · leading places in the Triathlon (0.5mi/15mi/2mi)
| Place | Name | Time | Pace |
|---|---|---|---|
| 1 | John Hirsch | 1:13:24 | 4:12 /mi |
| 2 | Michael May | 1:17:53 | 4:27 /mi |
| 3 | Jeremy Stoll | 1:21:45 | 4:40 /mi |
| 4 | Frances Torres | 1:22:19 | 4:42 /mi |
| 5 | Flynn McGrath | 1:28:01 | 5:02 /mi |
Every finisher is on the results page, filterable by distance, gender and age group.
Other races near Stony Point
Different organizers, within 40 miles, in the next three months
Town of Cortlandt 5k Road Race
Empire State Half Marathon & 5k
5 Mile Turkey Trot for The Marisa Fund
2026 Harry Chapin Memorial Run/Walk Against Hunger
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 4 Stony Point events
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