Matthew O'Brien

Born : 1993 Cat. M23 Ultrarunner since 2017

DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.

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

Countries visited ?

United States

25,7%

Rank quotient ?This runner's calculation uses 21 eligible race(s): Σ(rank − 1) = 501; Σ finishers = 1 950. 501 / 1 950 × 100 = 25.69%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed21

Km — ultra races1 813 km

> 100 km4

> 160 km3

> 24h2

Longest race160,9 km

33th Vermont 100 Mile Endurance Race — 16/7/2022

Km per year (ultra races)

301

2022

150

2023

2024

2025

2026

Race types (share of distance)

Road2,8%

Trail92,4%

Elim.4,9%

Wins & podiums (ultra)

🏆 Win0

🏆 Win M0

🏅 Top 32

🏅 Top 3 M2

Longest winning streak0

Current streak0

Records

50 km4h31'12 100 km13h10'58 50 mi10h08'05 100 mi22h16'05 24 h115,07 km

HISTORY

21 race(s)

Date		Race	Perf.	Rk
2026
18.04	50km	15th Earth Day 50k	5:40:50 h	17
2023
10.06	100km	28th Kettle Moraine 100 km Endurance Run	14:00:40 h	13
14.01	50km	11th Frozen Gnome 50K	6:03:59 h	19
2022
16.07	100mi	33th Vermont 100 Mile Endurance Race	23:37:56 h	61
14.05	56mi	10th Cruel Jewel 50 Mile	14:26:31 h	14
08.01	50km	10th Frozen Gnome 50K	5:40:26 h	4
2021
04.12	24h	2nd The Tennessee Mile 24 Hour Run	115.068 km	2 🥈
02.10	100mi	7th The Hennepin Hundred - 100 Mile Run	22:16:05 h	30
19.06	37h	2nd Mid-State Mile	88.513 km	13
30.04	100km	10th Ultra Race of Champions (UROC) 100K	13:10:58 h	30
2020
29.02	50mi	7th Monument Valley 50 Mile Race	11:08:32 h	14
2019
02.11	50km	20th Chicago Lakefront Fall 50km Race	5:00:41 h	15
07.09	100km	4th NUT 100K	15:17:44 h	20
20.07	100mi	31th Vermont 100 Mile Endurance Race	25:36:01 h	47
11.05	50mi	38th Ice Age Trail 50 Mile Run	10:08:05 h	140
20.04	50km	9th TARC Spring Classic 50 km	4:31:12 h	4
09.03	50km	14th Montaña de Oro 50 km Race	6:03:58 h	19
2018
09.06	50mi	2nd Endurance Challenge - Massachusetts Trail 50 Miles	10:47:18 h	17
21.04	50km	8th TARC Spring Classic 50 km	4:37:15 h	9
2017
02.12	40mi	7th TARC Fells Trail Ultra Winter 40 Mile	7:26:52 h	3 🥉
10.06	50mi	1st Endurance Challenge - Massachusetts Trail 50 Mile	12:12:41 h	31

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	16/7/2022	33th Vermont 100 Mile Endurance Race	160,93	×4
✓ 2	2/10/2021	7th The Hennepin Hundred - 100 Mile Run	160,93	×4
✓ 3	20/7/2019	31th Vermont 100 Mile Endurance Race	160,93	×4
✓ 4	4/12/2021	2nd The Tennessee Mile 24 Hour Run	115,07	×2
✓ 5	10/6/2023	28th Kettle Moraine 100 km Endurance Run	100,00	×2
✓ 6	30/4/2021	10th Ultra Race of Champions (UROC) 100K	100,00	×2
✓ 7	7/9/2019	4th NUT 100K	100,00	×2
✓ 8	14/5/2022	10th Cruel Jewel 50 Mile	90,12	×2
✓ 9	19/6/2021	2nd Mid-State Mile	88,51	×2
✓ 10	29/2/2020	7th Monument Valley 50 Mile Race	80,47	×2
✓ 11	11/5/2019	38th Ice Age Trail 50 Mile Run	80,47	×2
✓ 12	9/6/2018	2nd Endurance Challenge - Massachusetts Trail 50 Miles	80,47	×2
✓ 13	10/6/2017	1st Endurance Challenge - Massachusetts Trail 50 Mile	80,47	×2
✓ 14	2/12/2017	7th TARC Fells Trail Ultra Winter 40 Mile	64,37	×1
✓ 15	18/4/2026	15th Earth Day 50k	50,00	×1
✓ 16	14/1/2023	11th Frozen Gnome 50K	50,00	×1
✓ 17	8/1/2022	10th Frozen Gnome 50K	50,00	×1
✓ 18	2/11/2019	20th Chicago Lakefront Fall 50km Race	50,00	×1
✓ 19	20/4/2019	9th TARC Spring Classic 50 km	50,00	×1
✓ 20	9/3/2019	14th Montaña de Oro 50 km Race	50,00	×1
✓ 21	21/4/2018	8th TARC Spring Classic 50 km	50,00	×1