Michael McDuffie
ID 209576
Born : 1984 Cat. M40 Ultrarunner since 2010 USA
38
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
53
DUV-index+ ?Largest integer N such that the race distances provide at least N complete segments of N km in total. A single long race may therefore contribute several segments. See the DUV-Index tab for the detailed calculation. calculation details
2
Countries visited ?JPNJapanUSAUnited States
40,4%
Rank quotient ?This runner's calculation uses 38 eligible race(s): Σ(rank − 1) = 2 215; Σ finishers = 5 483. 2 215 / 5 483 × 100 = 40.40%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed38
Km — ultra races4 054 km
> 100 km16
> 160 km14
> 200 km1
> 24h4
Longest race217,3 km
11th Arrowhead Winter Ultra — 25/1/2016

Km per year (ultra races)

341
4 races
2022
174
2 races
2023
241
2 races
2024
80
1 race
2025
2026

Race types (share of distance)

Road10,3%
Trail87,6%
Elim.2,2%

Wins & podiums (ultra)

🏆 Win0
🏆 Win M0
🏅 Top 30
🏅 Top 3 M1
Longest winning streak0
Current streak0

Records

50 km4h19'0350 mi8h19'42100 mi23h08'286 h50,69 km24 h123,87 kmBackyard13 loops

HISTORY

39 race(s)
DateRacePerf.Rk
2025
22.11 50mi USA63rd JFK 50 Mile 9:22:42 h302
2024
19.07 100mi USA35th Vermont 100 Mile Endurance Race 29:09:06 h230
01.06 50mi USA7th Chesterfield Gorge 50 Mile Ultra Race 11:35:23 h27
2023
11.11 Backyard Ultra USA4th Race for DFL 87.178 km (13h)14
24.06 54mi USA11th Manitou's Revenge Ultramarathon 18:43:10 h70
2022
08.10 100mi USA4th Midstate Massive 100 Mile Ultra Trail 27:36:28 h38
25.09 50mi USA29th Vermont 50 Miles Ultra Run 11:09:47 h73
10.09 50km USA11th TARC Fall Classic 50 km 6:50:49 h48
04.06 50km USA5th Chesterfield Gorge 50 km Ultra Race 5:46:24 h25
2018
08.09 50mi USA1st Kilkenny Ridge 50mi Race 17:20:13 h20
2017
13.05 100mi USA1st Riverlands 100 24:56:00 h7
2016
30.04 50mi USA9th Endurance Challenge - New York Trail 50 Miles 10:37:01 h97
26.03 6h USA1st TARC To Hale and Back 6 Hours 50.694 km8
25.01 135mi USA11th Arrowhead Winter Ultra 2d 09:52:00 h24
2015
11.09 100mi USA25th Superior Fall Trail Races 100 Mile 31:14:05 h52
01.08 36mi USA4th Moosalamoo Ultra 7:19:10 h5
19.04 50km USA19th TARC Don't Run Boston (DRB) 50K Split 6:22:00 h3 🥉
2014
02.08 36mi USA3rd Moosalamoo Ultra 7:24:13 h8
19.07 100mi USA26th Vermont 100 Mile Endurance Race 23:08:28 h103
25.04 100mi JPN3rd Ultra-Trail Mt. Fuji 41:44:49 h441
2013
07.12 40mi USA3rd TARC Fells Trail Ultra Winter 40 Mile 8:24:24 h8
06.09 100mi USA23th Superior Fall Trail Races 100 Mile 33:03:56 h30
27.07 100mi USA7th Burning River 100 Mile Endurance Run 26:06:40 h72
14.06 100mi USA1st TARC 100 Mile 25:35:47 h26
04.05 50mi USA6th Endurance Challenge - New York Trail 50 Miles 11:33:12 h90
27.04 50km USA3rd TARC Spring Classic 50 km 5:48:13 h65
19.04 100mi USA2nd The Zion 100 Mile Run 26:45:42 h41
26.01 100mi USA4th Beast of Burden Winter 100 Miler 24:29:51 h14
05.01 50km USA15th Fat Ass Race - GAC FA50 5:14:00 h27
2012
27.10 100mi USA4th Ghost Train Rail Trail Race 100 Mile 23:12:30 h5
13.10 50km USA2nd TARC Fall Classic 50 km 4:31:36 h5
30.09 50mi USA19th Vermont 50 Miles Ultra Run 8:50:50 h47
27.07 24h USA16th Around The Lake Ultra 24h 123.871 km18
27.05 50mi USA7th Trail Festival at Pineland Farms 8:19:42 h22
28.04 50km USA2nd TARC Spring Classic 50 km 4:19:03 h9
31.03 100mi USA18th Umstead Endurance Run 100 Miles 26:57:14 h99
2011
29.07 24h USA15th Around The Lake Ultra 24h 113.667 km24
22.05 50mi USA1st Dirty German Endurance Fest 50 Mile 9:33:39 h26
2010
31.12 24h USA3rd Freedom Park New Year's Ultra 24h 77.748 km33