Ruth Anderson
ID 265465
Born : 1929 Cat. W95 Ultrarunner since 1976 USA
50
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
2
Countries visited ?GBRUnited KingdomUSAUnited States
78,4%
Rank quotient ?This runner's calculation uses 59 eligible race(s): Σ(rank − 1) = 6 035; Σ finishers = 7 699. 6 035 / 7 699 × 100 = 78.39%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed59
Km — ultra races4 380 km
> 100 km6
> 160 km3
> 24h4
Longest race177,4 km
3rd Redwood Empire 24 Hour Run — 22/3/1986

Km per year (ultra races)

2022
2023
2024
2025
2026

Race types (share of distance)

Road46,6%
Trail53,4%

Wins & podiums (ultra)

🏆 Win0
🏆 Win F8
🏅 Top 33
🏅 Top 3 F14
Longest winning streak0
Current streak0

Records

50 km4h17'53100 km10h54'5950 mi7h10'58100 mi16h50'4712 h64,80 km24 h177,43 km

HISTORY

59 race(s) · 7 split(s) nested
DateRacePerf.Rk
2002
20.07 12h USA5th Jim Skophammer 12 Hour Track Run 64.800 km27
1999
04.12 50km USA10th Sunmart Texas Trails 50 km 7:45:31 h493
05.06 50km USA10th Shadow of the Giants 50K 9:12:36 h108
13.02 50km USA21st Jed Smith Ultra Classic - 50 km Race 6:56:39 h102
1998
12.12 50km USA9th Sunmart Texas Trails 50 km 8:24:59 h495
01.08 50km USA17th Skyline 50k Endurance Run 9:00:19 h234
09.05 50km USA15th Quicksilver 50 km Endurance Run 7:36:00 h107
07.02 50km USA20th Jed Smith Ultra Classic - 50 km Race 6:29:12 h86
1997
13.12 50km USA8th Sunmart Texas Trails 50 km 7:35:27 h426
09.11 12h USA5th DSE Distance Classic 12 Hour 50.732 km15
10.05 50km USA14th Quicksilver 50 km Endurance Run 8:03:07 h111
18.01 50km USA19th Jed Smith Ultra Classic - 50 km Race 6:14:49 h104
06.01 46km USAEpiphany Ultras - The Popular But Wussy Metric 7:33:00 h25
1996
12.12 50km USA7th Sunmart Texas Trails 50 km 6:47:57 h332
03.08 50km USA15th Skyline 50k Endurance Run 8:14:51 h182
03.02 50km USA18th Jed Smith Ultra Classic - 50 km Race 6:09:26 h121
1994
08.10 50mi USA12th Dick Collins Firetrails 50 Mile 12:33:23 h68
15.05 50km USA7th Ohlone 50K Wilderness Run 7:52:39 h43
16.04 100km USA9th Ruth Anderson Ultra 100km 12:51:30 h22
12.03 50km USA5th Way Too Cool 50K Endurance Run 7:43:02 h315
1993
01.08 50km USA12th Skyline 50k Endurance Run 8:03:17 h139
13.03 50km USA4th Way Too Cool 50K Endurance Run 6:58:11 h271
30.01 50km USA7th Ledson Marsh 50 km 6:41:43 h30
1992
30.12 24h USAUSA/TAC 24 Hour Championship 125.528 km28
09.05 50km USA9th Quicksilver 50 km Endurance Run 7:28:11 h70
18.04 100km USA7th Ruth Anderson Ultra 100km 12:12:53 h16
04.04 50mi USA13th American River 50 Mile Endurance Run 10:19:58 h287
1991
28.12 24h USA2nd Gibson Ranch 24-hour Classic 69.201 km57
19.05 50km USA5th Ohlone 50K Wilderness Run 8:24:35 h69
1990
20.05 50km USA4th Ohlone 50K Wilderness Run 7:16:31 h39
21.04 100km USA5th Ruth Anderson Ultra 100km 11:30:58 h6
1989
21.05 50km USA3rd Ohlone 50K Wilderness Run 6:44:41 h45
1988
22.10 100km USA6th Edmund Fitzgerald 100K Road Race 11:56:23 h40
15.05 50km USA2nd Ohlone 50K Wilderness Run 7:03:48 h38
14.02 50mi USA10th Pacific Crest Trail Fifty 12:56:15 h90
1987
22.08 24h USADick Collins 24 Hour Track Run 135.343 km13
17.05 50km USA1st Ohlone 50K Wilderness Run 7:14:07 h37
1986
11.10 50mi USA4th Dick Collins Firetrails 50 Mile 10:48:57 h26
28.06 100mi USA13th Western States 100 Mile Endurance Run 28:56:05 h179
19.04 100km USA1st Ruth Anderson Ultra 100km 10:54:59 h5
22.03 24h USA3rd Redwood Empire 24 Hour Run 177.430 km11
1985
04.08 50km USA4th Skyline 50k Endurance Run 5:35:37 h139
1984
06.10 51mi USACow Mountain Trail Run 9:27:00 h56
05.08 50km USA3rd Skyline 50k Endurance Run 5:25:32 h121
1983
25.06 93.5mi USA10th Western States 100 Mile Endurance Run 28:11:00 h165
28.05 50mi USADonner Trail 50 Miler 10:14:00 h13
17.04 50mi USA4th American River 50 Mile Endurance Run 9:04:46 h206
1982
02.10 48.6mi USACow Mountain Planet Earth Run 9:01:50 h47
18.04 50mi USA3rd American River 50 Mile Endurance Run 9:10:04 h118
1981
12.04 50mi USA2nd American River 50 Mile Endurance Run 8:53:48 h135
1980
04.09 47mi USACow Mountain Planet Earth Run 7:54:00 h11
17.02 50mi USAGulf States Ultras - 50mile 7:10:58 h2 🥈
1979
30.09 87.3km GBR29th London to Brighton Road Race 7:46:16 h82
25.02 50mi USAPA-AAU 50 Miler 7:25:05 h35
1978
15.07 100mi USAWoodside 100-Mile Track Run 16:50:47 h3 🥉
1977
27.02 50mi USAPA-AAU 50 Mile Championship Race 7:35:40 h11
1976
26.12 50mi USALake Merced 50M 8:30:01 h6
26.12 100km USALake Merced 100K 11:22:46 h2 🥈
21.03 50km USAPA-AAU 50 km Race 4:17:53 h30