Stewart Mason
Born : 1975 Cat. M50 Ultrarunner since 2014 AUS
21
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
68
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
5
Countries visited ?AUSAustraliaCHIChileCRCCosta RicaNZLNew ZealandUSAUnited States
32,9%
Rank quotient ?This runner's calculation uses 21 eligible race(s): Σ(rank − 1) = 424; Σ finishers = 1 287. 424 / 1 287 × 100 = 32.94%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed47
Km — ultra races5 407 km
> 100 km18
> 160 km15
> 200 km11
> 24h9
> 48h4
Longest race602,4 km

Km per year (ultra races)

750
2 races
2022
215
1 race
2023
516
1 race
2024
510
1 race
2025
2026

Race types (share of distance)

Road44,4%
Trail25,2%
Stage28,7%
Elim.1,7%

Wins & podiums (ultra)

🏆 Win0
🏆 Win M0
🏅 Top 32
🏅 Top 3 M2
Longest winning streak0
Current streak0

HISTORY

23 race(s) · 7 stage(s) nested · 15 split(s) nested
DateRacePerf.Rk
2025
29.09 6d NZLNZ 6 Day Ultra Marathon - 6 Day 510.433 km9
2024
29.09 6d AUSAustralian 6 day - 6 Day 515.932 km9
2023
01.10 6d AUSAustralian 6 day - 6 Day 215.256 km38
2022
25.09 250km/6stages CHI16th Atacama Crossing (Chile) 31:46:12 h21
21–27.08 500km/7stages AUSSink Or Survive (S.O.S.) 500k stage race 3d 13:02:27 h3 🥉
2021
26.09 6d AUSAdelaide 6 day - 6 Day 602.351 km2 🥈
10.07 24h AUS11th Adelaide 24 hour race 161.562 km9
09.06 200mi AUS1st Irrational S.O.U.T.H. 200 Miler 3d 15:46:07 h10
2019
15.11 105.6mi AUSGreat Southern Endurance Run (GSER100) 2d 05:46:37 h35
13.07 12h AUS9th Adelaide 24 hour race - 12h split 94.600 km10
13.07 100km AUS9th Adelaide 24 hour race - 100km split 13:42:36 h13
13.07 24h AUS9th Adelaide 24 hour race 123.200 km19
15.06 Backyard Ultra AUS1st Mirrim Wurnit Back Paddock Backyard Ultra 93.884 km (14h)16
10.02 236km/6stages CRC15th The Coastal Challenge - Expedition Run 38:58:02 h26
2018
12.10 238mi USA2nd Moab 240 Endurance Run 4d 06:19:18 h66
14.07 24h AUS8th Adelaide 24 hour race 123.200 km29
05.05 100mi AUSHubert 100 - 100 Miles Run 29:04:36 h8
25.02 316km/7stages NZLAlps2Ocean Ultra 43:05:00 h15
2017
17.11 105.6mi AUSGreat Southern Endurance Run (GSER100) 2d 04:20:26 h54
08.07 24h AUS7th Adelaide 24 hour race 147.400 km9
2015
25.04 100km AUSAnzac Day Challenge 100 km Trail 10:38:13 h14
2014
28.09 56km AUS8th Yurrebilla Trail 56km Ultra 6:52:04 h43
02.07 250km/5stages AUS1st The Big Red Run 31:32:09 h10