Sean Cosgrove (M57)

2026

1 Race | 31 mi.

Chuckanut 50k

Mar 21st 2026
| Fairhaven, WA
Distance
50 KM
Overall
460 / 522
Division (M)
305 / 339
7:29:59

2025

1 Race | 31 mi.

Chuckanut 50k

Mar 15th 2025
| Fairhaven, WA
Distance
50 KM
Overall
583 / 623
Division (M)
377 / 397
7:57:29

2024

2 Races | 131 mi.

Devil Dog Ultras

Dec 7th 2024
| Triangle, VA
Distance
100 Miles
Overall
37 / 41
Division (M)
32 / 34
31:11:48

Chuckanut 50k

Mar 16th 2024
| Fairhaven, WA
Distance
50 KM
Overall
448 / 585
Division (M)
293 / 364
7:00:52

2023

2 Races | 62 mi.

Marine Corps Marathon

Oct 29th 2023
| Arlington, VA
Distance
50 KM
Overall
685 / 1293
Division (M)
509 / 923
5:48:32

Chuckanut 50k

Mar 18th 2023
| Fairhaven, WA
Distance
50 KM
Overall
293 / 446
Division (M)
200 / 279
6:27:25

2022

3 Races | 162 mi.

Devil Dog Ultras

Dec 3rd 2022
| Triangle, VA
Distance
100 Miles
Overall
22 / 33
Division (M)
19 / 26
30:06:51

Marine Corps Marathon

Oct 30th 2022
| Arlington, VA
Distance
50 KM
Overall
500 / 986
Division (M)
362 / 660
5:37:24

Chuckanut 50k

Mar 19th 2022
| Fairhaven, WA
Distance
50 KM
Overall
333 / 421
Division (M)
204 / 240
7:04:02

2019

1 Race | 31 mi.

Chuckanut 50k

Mar 16th 2019
| Fairhaven, WA
Distance
50 KM
Overall
254 / 442
Division (M)
180 / 278
6:39:47

2018

1 Race | 31 mi.

Chuckanut 50k

Mar 17th 2018
| Fairhaven, WA
Distance
50 KM
Overall
215 / 410
Division (M)
154 / 252
6:17:31

2017

1 Race | 31 mi.

Chuckanut 50k

Mar 18th 2017
| Fairhaven, WA
Distance
50 KM
Overall
318 / 414
Division (M)
228 / 280
7:03:01
12
Races
9y 0m 5d
Longevity
511
Lifetime Miles

Personal Bests

50k (10)
5:37:24
2022
100m (2)
30:06:51
2022

Distance by Year

2026
31 Miles
1 Race
2025
31 Miles
1 Race
2024
131 Miles
2 Races
2023
62 Miles
2 Races
2022
162 Miles
3 Races
2019
31 Miles
1 Race
2018
31 Miles
1 Race
2017
31 Miles
1 Race

Multiple Performances

2026
305th Place
2025
377th Place
2024
293rd Place
2023
200th Place
2022
204th Place
2019
180th Place
2018
154th Place
2017
228th Place
2024
32nd Place
2022
19th Place
2023
509th Place
2022
362nd Place

Weekly Newsletter

A roundup of the week's content and most recent race results. Sent once a week on Thursday.

Recent Results

Lake to Ocean 100K
Port Mayaka, FL - 19 finishers
100 KM
MCW The Tatum Classic
Middletown Township, NJ - 16 finishers
50 KM
Run Comfy Numb Trail Race
Whistler, BC - 68 finishers
50 KM
Momentus Backyard Ultra
Monroe, NC - 74 finishers
Backyard
The Midwest Ultra Track Classic
Warrensburg, MO - 19 finishers
24 Hours | 12 Hours | 6 Hours
Infinitus
Ripton, VT - 36 finishers
100 Miles | 88 KM
North Fork 50 Mile/50K
Pine, CO - 255 finishers
50 Miles | 50 KM
Chesterfield Gorge Ultra
West Chesterfield, MA - 120 finishers
100 Miles | 100 KM | 50 Miles | 50 KM
Great Mansfield Outdoors
Mansfield, ON - 56 finishers
100 KM | 50 KM
View All Results