Cathy Mason
Born : 1950 Cat. W75 Ultrarunner since 1980 USA
50
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
60
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
82,3%
Rank quotient ?This runner's calculation uses 66 eligible race(s): Σ(rank − 1) = 3 774; Σ finishers = 4 587. 3 774 / 4 587 × 100 = 82.28%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed66
Km — ultra races6 195 km
> 100 km16
> 160 km10
> 200 km5
> 24h15
> 48h14
Longest race359,2 km

Km per year (ultra races)

536
4 races
2022
643
6 races
2023
387
3 races
2024
697
5 races
2025
243
2 races
2026

Race types (share of distance)

Road16,6%
Trail83,4%

Wins & podiums (ultra)

🏆 Win0
🏆 Win F6
🏅 Top 33
🏅 Top 3 F11
Longest winning streak0
Current streak0

HISTORY

66 race(s)
DateRacePerf.Rk
2026
18.07 50km USA25th Tahoe Rim Trail 55km Endurance Run 16:35:48 h153
13.05 4d USA16th Born to Run Ultra 4 days Marathon 193.121 km17
2025
28.12 6d USA41st Across the Years, 6 days 245.223 km63
14.11 48h USA4th Tierra Redonda Mountain Trail Run 93.953 km19
24.10 48h USA2nd Weekend at Burney 48h 93.341 km9
04.10 48h USA8th Back On the Ranch Trail 48 Hour Run 87.548 km35
14.05 4d USA15th Born to Run Ultra 4 days Marathon 177.027 km19
2024
16.11 48h USA3rd Tierra Redonda Mountain Trail Run 95.595 km11
05.10 48h USA7th Back On the Ranch Trail 48 Hour Run 107.826 km5
04.04 72h USA12th Beyond Limits Ultra Race 72 Hour 183.465 km11
2023
09.12 50km USA1st Doomsday 12:00:39 h48
17.11 48h USA2nd Tierra Redonda Mountain Trail Run 84.973 km3 🥉
23.09 48h USA5th Ride To Walk 48 Hour Endurance Race 98.235 km17
15.07 55km USA22th Tahoe Rim Trail 55km Endurance Run 17:22:07 h99
12.04 4d USA13th Born to Run Ultra 4 days Marathon 241.401 km15
03.03 48h USA10th Jackpot Ultra Running Festival 48 Hour Race 113.482 km39
2022
18.11 48h USA1st Tierra Redonda Mountain Trail Run 163.428 km7
24.09 48h USA4th Ride To Walk 48 Hour Endurance Race 91.796 km11
16.07 55km USA21th Tahoe Rim Trail 55km Endurance Run 16:24:01 h135
13.04 4d USA12th Born to Run Ultra 4 days Marathon 225.308 km13
2021
28.12 6d USA37th Across the Years, 6 days 359.160 km23
18.09 48h USA3rd Ride To Walk 48 Hour Endurance Race 101.388 km13
21.04 4d USA11th Born to Run Ultra 4 days Marathon 225.308 km14
2018
01.07 50km USARun with the Ponies 50K 9:58:00 h13
2017
12.08 100km USA7th Cool Moon 100 km Endurance Run 21:38:00 h3 🥉
2016
13.08 50mi USA6th Cool Moon 50 Mile Endurance Run 16:21:00 h15
16.04 50km USAMokelumne River 50 km Trail Run 9:48:09 h42
2015
22.08 50mi USA2nd Pioneer Spirit 50M 15:49:46 h30
08.08 100km USA5th Cool Moon 100 km Endurance Run 19:55:31 h5
25.07 50km USA5th Harding Hustle 50K 9:39:27 h63
04.07 50km USA1st Lovers Leap of Faith 50 km 10:16:27 h11
02.05 50mi USA4th Ride the Wind 50 Mile 17:04:50 h19
18.04 50km USAMokelumne River 50 km Trail Run 9:14:04 h40
15.03 50km USA2nd Lake Natoma 50K 7:33:50 h19
2014
20.09 50mi USA4th Yellowstone-Teton 50 Mile Endurance Run 15:58:00 h29
09.08 100mi USA4th Cool Moon 100 Mile Endurance Run 42:09:47 h5
19.04 50km USAMokelumne River 50 km Trail Run 8:29:22 h52
08.02 50km USA4th American Canyon Ultramarathon 11:48:50 h51
2013
23.11 50mi USA4th The Spirit of Rock 50M 13:56:53 h48
20.07 50km USA12th Tahoe Rim Trail 50km Endurance Run 11:43:11 h125
09.02 50km USA3rd American Canyon Ultramarathon 8:47:02 h101
2012
13.10 50mi USA3rd The Spirit of Rock 50M 14:03:59 h39
16.09 50km USA1st Mathis Memorial Folsom Point Trail Runs 8:52:00 h17
18.08 50km USA2nd Rattlesnake Ultramarathon and Trail Race 11:06:15 h7
07.04 50mi USA33rd American River 50 Mile Endurance Run 14:00:52 h689
11.02 50km USA2nd American Canyon Ultramarathon 10:09:05 h61
2011
12.11 50km USA3rd Folsom Point - Fall 8:55:03 h34
10.09 36.4mi USA7th Lake of the Sky 32 Mile 11:01:50 h24
20.08 50km USA1st Rattlesnake Ultramarathon and Trail Race 9:32:30 h7
04.06 50km USA4th Auburn Trail Run 50K 9:29:58 h25
07.05 50km USA3rd Jenkinson Lake Trail Run 9:52:59 h10
23.04 50km USA3rd Folsom Point - Spring 7:56:12 h31
26.02 50km USA1st American Canyon Ultramarathon 10:08:53 h26
12.02 50km USA2nd Cool Trail Runs 9:18:20 h29
2010
13.11 50km USA2nd Folsom Point - Fall 8:16:36 h26
23.10 50km USA2nd Jenkinson Lake Trail Run 9:41:10 h6
16.10 50mi USA1st The Spirit of Rock 50M 12:41:39 h63
14.08 12h USA3rd Hotter than Hell 12 Hr Run 80.467 km15
17.07 24h USACool Moon 24 Hour Run 109.435 km2 🥈
2009
14.03 50km USA20th Way Too Cool 50K Endurance Run 8:52:01 h456
2008
02.08 12h USA2nd Cool 12 Hour Night Run 57.936 km33
1982
18.04 50mi USA3rd American River 50 Mile Endurance Run 9:53:43 h190
1981
27.06 93.5mi USA8th Western States 100 Mile Endurance Run 27:11:00 h106
12.04 50mi USA2nd American River 50 Mile Endurance Run 10:48:48 h244
1980
28.06 93.5mi USA7th Western States 100 Mile Endurance Run 28:23:07 h97
13.04 50mi USA1st American River 50 Mile Endurance Run 12:41:13 h153