Dirty Dozen 50k Trail Run

Race completed

50 km Distance

not publishedn/a Climbing

2.5 est Grit · Entry level

Calculated from 50 km alone — the organiser has not published an elevation profile. Read 2.5 as a floor, not a verdict.

40.7128° N, 74.0060° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 8 hours 9:36 min/km average. Tight. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Tighter than 84% of 50K races. Measured against 1058 races of the same distance. Cut-off calculator →

Field size ~19 Tiny. You will run alone for most of it.

DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, August

Daytime high 26°C

Night low 21°C

Rainfall Showers likely

Daylight 13 h 16 m of light

Regional 2001-2020 average for August — NASA POWER, grid elevation 10 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	50km	19	Alex Kunce · 04:25:30	Jennifer Modie · 05:35:05
2024	50km	22	Alex Kunce · 04:15:09	Karoliina Lohiniva · 05:16:53
2023	50km	12	Mina Ebrahem · 04:12:30	Rika Nakamura · 05:22:22
2022	50km	16	Jeffrey McDonnell · 03:57:41	Bethany Welch · 05:11:20
2021	50km	20	Victor Rivera · 05:03:00	Shanna Beairsto · 05:14:01
2019	50km	30	Sam Hitch · 04:05:10	Emily Templeton · 05:37:51
2018	50km	12	Chris Rouland · 03:58:48	Anita Devineni · 05:03:26
2017	50km	22	Sam Hitch · 03:57:28	Meghan Tomczyk · 05:21:50

The field shrank 14% between 2024 (22) and 2025 (19). 21% of the 2025 field were women.

DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Course notes

gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.

Gear for this race

Chosen for 50 km of trail.

Trail Running Shoes 50 km of trail — cushioning that is still there in the last quarter.
Race Nutrition 50 km of self-supported fuelling between aid stations.
Hydration Vests Flask capacity for 50 km, without the bounce.
GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.

Adidas

Terrex Speed Ultra

RunRepeat found the Adidas Terrex Speed Ultra to have a grippy outsole and great lockdown, while iRunFar noted that the shoe works on a variety of trail conditi…

★★★★★ 4.5

New Balance

Fuel Cell Super Comp Trail

★★★★★ 4.5

Tailwind

Endurance Fuel

All-in-one calorie and electrolyte drink mix. 200 calories per serving.

$25 ★★★★★ 4.8

Salomon

ADV Skin 12

Industry-standard 12L race vest with front flask pockets and minimal bounce.

$180 ★★★★★ 4.8

Garmin

Enduro 3

Ultra-endurance GPS watch with solar charging and 300+ hour battery in GPS mode.

$900 ★★★★★ 4.8

All gear guides →

Overview

The Dirty Dozen 50k Trail Run in New York, NY took runners through 12 hilly loops in Forrest Park with an 8-hour time limit. That cut-off was tighter than 84% of 50k races and more generous than only 16%, demanding a sustained pace faster than 9.6 minutes per kilometer across the full distance.

With 19 finishers in 2025 across an event history of 8 editions dating back to 2017, it maintained an intimate footprint on the trail. The event drew a smaller field than 69% of 50k races and ran bigger than 30%, keeping congestion low through the repeated circuits.

Similar races

Other 50K trail ultras, closest in distance first.