Robert Irr
ID 849877
Born : 1987 Cat. M35 Ultrarunner since 2016 USA
38
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
50
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
1
Countries visited ?USAUnited States
8,8%
Rank quotient ?This runner's calculation uses 38 eligible race(s): Σ(rank − 1) = 337; Σ finishers = 3 817. 337 / 3 817 × 100 = 8.83%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed38
Km — ultra races3 415 km
> 100 km12
> 160 km9
Longest race160,9 km
14th Idaho Mountain Trail Ultra Festival (IMTUF 100) — 20/9/2025

Km per year (ultra races)

322
2 races
2022
261
3 races
2023
261
2 races
2024
211
2 races
2025
2026

Race types (share of distance)

Road1,5%
Trail98,5%

Wins & podiums (ultra)

🏆 Win8
🏆 Win M8
🏅 Top 316
🏅 Top 3 M17
Longest winning streak2
Current streak0

Records

50 km3h26'04100 km11h17'0050 mi8h06'16100 mi17h49'10

HISTORY

38 race(s)
DateRacePerf.Rk
2025
20.09 100mi USA14th Idaho Mountain Trail Ultra Festival (IMTUF 100) 24:39:15 h10
25.05 50km USA14th Pigtails Challenge 50 km 3:29:03 h1 🏆
2024
13.09 100mi USA18th Run Rabbit Run 100 Mile UltraMarathon - Hares Run 21:45:21 h13
08.06 100km USA15th Lumberjack Endurance 100 km Run 11:24:00 h1 🏆
2023
11.11 50km USA14th Grand Ridge 50 km Trail Run 5:26:00 h1 🏆
24.03 100mi USA13th Badger Mountain 100 Mile Challenge 17:51:19 h2 🥈
18.02 50km USA5th Run Forest Run 50k Race 4:22:09 h2 🥈
2022
16.09 100mi USA16th Run Rabbit Run 100 Mile UltraMarathon - Hares Run 23:43:46 h18
25.03 100mi USA12th Badger Mountain 100 Mile Challenge 17:49:10 h1 🏆
2021
11.09 100mi USA10th Idaho Mountain Trail Ultra Festival (IMTUF 100) 24:12:58 h6
24.07 50km USA6th Needles 50k 6:00:00 h2 🥈
12.06 100km USA12th Lumberjack Endurance 100 km Run 11:17:00 h1 🏆
26.03 100mi USA11th Badger Mountain 100 Mile Challenge 18:09:07 h1 🏆
2020
01.02 50km USA8th Fort Ord 50K Trail Run 4:24:30 h3 🥉
2019
14.12 50km USA17th Pigtails Run 50K 3:26:04 h2 🥈
27.07 50mi USA27th White River 50 Mile Endurance Run 8:06:16 h11
08.06 50km USA2nd Fragrance Lake 50km Race 5:02:51 h1 🏆
18.05 50km USA3rd Dirty Turtle 50k 5:20:55 h1 🏆
30.03 68mi USA7th Georgia Death Race 14:35:34 h4
16.02 60km USA6th Black Canyon Trail 60 km Run 4:57:14 h7
26.01 50km USA2nd Arches Ultra 50 km Race 4:09:03 h3 🥉
2018
05.10 100mi USA10th Grindstone 100 Mile 22:53:11 h12
18.08 100km USA4th Castle Peak 100 13:30:56 h11
23.06 50km USA7th Rodeo Valley 50 km Trail Run 4:49:28 h9
10.03 50mi USA7th Marin Ultra Challenge 50 Mile Race 8:33:30 h15
2017
09.12 100km USA15th Hellgate 100 km 13:28:51 h18
04.11 50mi USA35th Mountain Masochist 50 Mile Trail Run 9:17:57 h31
06.10 100mi USA9th Grindstone 100 Mile 23:23:21 h29
10.06 70.5mi USA38th Laurel Highlands 70 Mile Ultra 16:31:09 h30
13.05 50km USA7th Glacier Ridge Trail 50 km Ultramarathon 5:08:52 h2 🥈
01.04 68mi USA5th Georgia Death Race 16:56:26 h30
11.03 50km USA5th Buzzard Day 50 km Trail Race 5:27:05 h5
11.02 50km USA22nd Holiday Lake 50K++ 4:32:41 h25
2016
05.11 50mi USA34th Mountain Masochist 50 Mile Trail Run 9:38:31 h50
08.10 50km USA8th Oil Creek 50 km Trail Run 5:02:29 h3 🥉
17.09 50km USA12th Youngstown Ultra Trail Classic 50K 5:50:50 h4
27.08 50km USA6th Moebius Green Monster Trail 50K 4:32:16 h6
30.07 32.5mi USA5th Allegheny Front Trail Run (AFTR) - 50K Seneca Run 5:57:02 h4