Jason Brock
ID 658964
Born : 1976 Cat. M50 Ultrarunner since 2015 USA
44
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
80
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
32,7%
Rank quotient ?This runner's calculation uses 44 eligible race(s): Σ(rank − 1) = 1 939; Σ finishers = 5 921. 1 939 / 5 921 × 100 = 32.75%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed44
Km — ultra races8 572 km
> 100 km32
> 160 km31
> 200 km14
Longest race496,6 km
1st Arizona Monster 300 — 4/4/2025

Km per year (ultra races)

1 764
8 races
2022
1 136
6 races
2023
1 393
7 races
2024
959
3 races
2025
824
3 races
2026

Race types (share of distance)

Trail98,7%
Elim.1,3%

Wins & podiums (ultra)

🏆 Win1
🏆 Win M1
🏅 Top 33
🏅 Top 3 M3
Longest winning streak1
Current streak0

Records

50 km4h34'07100 km15h41'5950 mi7h54'19100 mi25h15'24Backyard16 loops

HISTORY

44 race(s)
DateRacePerf.Rk
2026
07.08 206mi USA12th Bigfoot 200 Endurance Run 3d 15:22:22 h78
26.06 100mi USA4th Copper Kings 100 28:16:47 h27
12.06 206mi USA11th Tahoe 200 Mile Endurance Run 3d 12:13:32 h83
2025
31.05 50km USA4th Connor's Claims 50 km Ultra 9:55:01 h19
05.05 412.8km USA5th Cocodona 250 5d 01:58:06 h170
04.04 308.6mi USA1st Arizona Monster 300 5d 19:41:02 h106
2024
25.09 200mi USA7th Sangre de Cristo Ultra 200 Mile Race 3d 17:47:00 h1 🏆
09.08 206mi USA10th Bigfoot 200 Endurance Run 2d 15:56:23 h16
03.08 100mi USA36th Angeles Crest 100 Mile 32:46:10 h106
22.07 200mi USA1st The Summit 200 4d 05:25:28 h7
01.06 Backyard Ultra USA1st Butterfield Backyard 107.296 km (16h)3 🥉
27.04 50km USA11th The Canyons Endurance 50 km Run 6:10:22 h193
13.04 100km USA21st Desert Rats Trail Running Festival 100 km 15:41:59 h52
2023
13.10 100mi USA13th Kodiak Ultra Marathons by UTMB - 100M 32:36:57 h93
08.09 100mi USA44th Wasatch Front 100 Mile 34:37:59 h148
11.08 206mi USA9th Bigfoot 200 Endurance Run 3d 03:59:40 h21
08.04 100mi USA12th The Zion 100 Mile Run 30:50:45 h75
04.02 100mi USA3rd Forgotten Florida 100 Mile Race 26:47:40 h31
14.01 100mi USA3rd The Shippey 100mi Endurance Runs 28:34:24 h7
2022
03.12 100mi USA6th Loup Garou 100 Mile Trail Run 25:38:12 h5
05.11 100mi USA22nd Rio Del Lago 100 Mile Endurance Run 27:37:00 h115
07.10 238mi USA6th Moab 240 Endurance Run 3d 07:06:50 h8
23.09 100mi USA24th The Bear 100 Mile Endurance Run 27:25:00 h60
12.08 206mi USA8th Bigfoot 200 Endurance Run 3d 07:12:02 h14
29.07 100mi USA1st Elkhorn 100 Endurance Run 37:51:00 h2 🥈
17.06 202mi USA7th Tahoe 200 Mile Endurance Run 2d 19:57:18 h8
04.06 50mi USA9th Scout Mountain 50 Miles Ultra Trail 11:31:25 h22
2021
14.08 55km USA7th Skyline Mountain Marathon 55K 7:47:52 h19
05.06 50mi USA8th Scout Mountain 50 Miles Ultra Trail 12:51:14 h21
2020
09.10 238mi USA4th Moab 240 Endurance Run 3d 19:19:01 h34
01.08 50km USA14th El Vaquero Loco 50K Mountain Race 7:35:38 h19
2019
16.11 50km USA9th Antelope Island Fall Classic 50K 4:52:17 h23
13.09 202mi USA6th Tahoe 200 Mile Endurance Run 2d 19:36:04 h12
03.08 50km USA13th El Vaquero Loco 50K Mountain Race 7:33:33 h31
17.05 100mi USA7th Bryce 100 Mile Trail Run 28:47:36 h16
2018
28.09 100mi USA20th The Bear 100 Mile Endurance Run 26:23:23 h43
07.09 202mi USA5th Tahoe 200 Mile Endurance Run 3d 02:01:43 h18
01.06 100mi USA6th Bryce 100 Mile Trail Run 25:15:24 h5
24.03 50mi USA13th Antelope Island Buffalo Run 50 Mile 8:17:38 h14
2017
11.11 50km USA7th Antelope Island Fall Classic 50K 4:34:07 h7
08.09 100mi USA38th Wasatch Front 100 Mile 28:14:06 h38
2016
09.09 100mi USA37th Wasatch Front 100 Mile 29:41:08 h83
2015
25.09 100mi USA17th The Bear 100 Mile Endurance Run 31:33:07 h121
21.03 50mi USA10th Antelope Island Buffalo Run 50 Mile 7:54:19 h9