Jason Mais
ID 447518
Born : 1979 Cat. M45 Ultrarunner since 2013 USA
40
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
30,9%
Rank quotient ?This runner's calculation uses 40 eligible race(s): Σ(rank − 1) = 1 648; Σ finishers = 5 325. 1 648 / 5 325 × 100 = 30.95%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed40
Km — ultra races3 499 km
> 100 km7
> 160 km6
> 24h1
Longest race160,9 km
47th Old Dominion 100 Mile Endurance Run — 7/6/2025

Km per year (ultra races)

441
5 races
2022
311
3 races
2023
229
3 races
2024
406
4 races
2025
50
1 race
2026

Race types (share of distance)

Trail100,0%

Records

50 km4h45'34100 km13h38'4050 mi9h34'24100 mi23h41'4124 h150,88 km

HISTORY

40 race(s)
DateRacePerf.Rk
2026
25.04 50km USA26th Promise Land 50K++ 6:37:47 h55
2025
13.12 100km USA23rd Hellgate 100 km 14:43:54 h38
01.11 50mi USA43rd Mountain Masochist 50 Mile Trail Run 9:34:24 h11
07.06 100mi USA47th Old Dominion 100 Mile Endurance Run 23:41:41 h34
29.03 40mi USA3rd Hone Quarry 40 Miler 8:59:02 h16
2024
07.12 100km USA22nd Hellgate 100 km 14:28:30 h44
02.11 50mi USA42nd Mountain Masochist 50 Mile Trail Run 10:16:02 h27
03.08 30mi USA10th Jarmans Invitational Marathon 6:32:07 h19
2023
09.12 100km USA21st Hellgate 100 km 15:24:54 h66
20.05 100mi USA29th Massanutten Mountain Trails 100 Mile 30:19:46 h57
22.04 50km USA23th Promise Land 50K++ 6:48:59 h81
2022
10.12 100km USA20th Hellgate 100 km 15:50:48 h66
05.11 50mi USA40th Mountain Masochist 50 Mile Trail Run 10:10:27 h23
25.06 100mi USA49th Western States 100 Mile Endurance Run 27:35:13 h176
23.04 50km USA22th Promise Land 50K++ 6:25:22 h47
12.03 50km USA18th Bel Monte 50 km Endurance Run 5:02:14 h7
2021
06.11 50mi USA39th Mountain Masochist 50 Mile Trail Run 10:11:22 h22
17.09 100mi USA13th Grindstone 100 Mile 32:12:00 h81
07.08 50km USA13th Dahlgren Heritage Rail Trail 50K 5:09:18 h32
30.04 100km USA10th Ultra Race of Champions (UROC) 100K 13:38:40 h33
13.03 50mi USA17th Bel Monte 50 Mile Endurance Run 11:29:57 h21
2020
14.03 50mi USA16th Bel Monte 50 Mile Endurance Run 11:23:25 h22
2019
02.11 50mi USA37th Mountain Masochist 50 Mile Trail Run 11:08:59 h67
27.09 100mi USA5th The Yeti 100 Mile Endurance Run 23:44:19 h55
07.09 40mi USA10th Odyssey Trail Running Rampage 40 Mile 8:59:50 h8
27.04 24h USA16th Virginia 24 Hour Run for Cancer 150.876 km15
09.03 50km USA15th Bel Monte 50 km Endurance Run 7:27:25 h33
2018
03.11 50mi USA36th Mountain Masochist 50 Mile Trail Run 10:39:46 h67
04.08 30mi USA4th Jarmans Invitational Marathon 7:14:31 h25
10.03 50mi USA14th Bel Monte 50 Mile Endurance Run 10:43:03 h13
2017
02.12 100mi USA2nd Devil Dog Ultra 100 Mile Race 26:59:50 h10
04.11 50mi USA35th Mountain Masochist 50 Mile Trail Run 9:56:14 h59
2016
05.11 50mi USA34th Mountain Masochist 50 Mile Trail Run 10:23:32 h80
09.04 50mi USA24th Bull Run Run 50 Miler 9:51:47 h67
2015
07.11 50mi USA33rd Mountain Masochist 50 Mile Trail Run 9:50:55 h54
24.10 50km USA2nd Patapsco Valley 50K 5:37:54 h22
01.08 50km USA7th Dahlgren Heritage Rail Trail 50K 4:45:34 h9
2014
19.04 50mi USA10th Bel Monte 50 Mile Endurance Run 12:21:30 h23
2013
31.08 50mi USA8th Iron Mountain 50 Mile Trail Run 11:44:35 h53
03.08 50km USA5th Dahlgren Heritage Rail Trail 50K 5:54:17 h50