John Buenfil
ID 269062
Born : 1946 Cat. M80 Ultrarunner since 1978 USA
37
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
51
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
76,1%
Rank quotient ?This runner's calculation uses 38 eligible race(s): Σ(rank − 1) = 2 200; Σ finishers = 2 891. 2 200 / 2 891 × 100 = 76.10%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed38
Km — ultra races3 838 km
> 100 km11
> 160 km3
> 200 km1
> 24h9
> 48h2
Longest race482,8 km
Spirit of '80 6-Day Track Race — 4/7/1980

Km per year (ultra races)

2022
2023
2024
2025
2026

Race types (share of distance)

Road67,7%
Trail32,3%

Records

50 km5h20'50100 km14h27'0550 mi8h35'4424 h165,00 km48 h147,66 km6 d482,80 km

HISTORY

39 race(s) · 1 split(s) nested
DateRacePerf.Rk
1992
18.07 24h USA9th Bay Area Ultrarunners 24 Hour Track Run 112.654 km19
18.04 100km USA7th Ruth Anderson Ultra 100km 14:27:05 h20
04.04 50mi USA13th American River 50 Mile Endurance Run 11:11:20 h340
1991
19.05 50km USA5th Ohlone 50K Wilderness Run 8:51:46 h76
1990
20.05 50km USA4th Ohlone 50K Wilderness Run 7:38:31 h42
1989
29.07 24h USA6th Bay Area Ultrarunners 24 Hour Track Run 96.800 km27
1984
22.10 50mi USA2nd Dick Collins Firetrails 50 Mile 10:47:15 h10
06.10 51mi USACow Mountain Trail Run 9:25:00 h54
22.09 72mi USA9th Lake Tahoe 72 Miler 15:42:25 h32
05.08 50km USA3rd Skyline 50k Endurance Run 6:07:34 h187
20.07 24h USABay Area Striders 24 Hour 124.321 km14
02.06 50mi USANugget 50 Mile Trail Run 11:59:59 h45
19.02 50mi USASanta Monica Mountains 50 Mile 12:06:00 h14
1983
26.12 50mi USA2nd Recover From The Holidays Fat Ass 50 8:59:00 h18
29.10 24h USANo Bullshit 24 hour Run 161.336 km10
08.10 48.6mi USACow Mountain Planet Earth Run 9:12:43 h43
04.06 50mi USANugget 50 Mile Trail Run 10:43:00 h10
20.02 50.8mi USASanta Monica Mountains 50 Mile 9:44:15 h12
1982
26.12 50mi USA1st Recover From The Holidays Fat Ass 50 9:52:00 h26
11.12 40mi USAArcata to Willow Creek Run 7:24:39 h23
16.10 24h USAWest Hills 24 Hour Track Run 149.199 km6
02.10 48.6mi USACow Mountain Planet Earth Run 8:47:00 h42
17.09 72mi USA7th Lake Tahoe 72 Miler 16:53:58 h57
01.08 50km USA1st Skyline 50k Endurance Run 6:21:40 h239
18.04 50mi USA3rd American River 50 Mile Endurance Run 10:49:52 h258
14.02 50mi USA5th Jed Smith Ultra Classic - 50 Mile Race 8:35:44 h65
1981
12.12 40mi USAArcata to Willow Creek Run 6:38:25 h12
29.11 50km USAUltra Challenge 50 km 5:20:50 h28
17.10 24h USAWest Hills 24 Hour Track Run 165.000 km6
03.10 48.6mi USACow Mountain Planet Earth Run 8:30:54 h23
18.09 72mi USA6th Lake Tahoe 72 Miler 14:41:10 h54
12.04 50mi USA2nd American River 50 Mile Endurance Run 9:45:02 h202
15.02 50mi USA4th Jed Smith Ultra Classic - 50 Mile Race 9:04:35 h93
1980
04.07 6d USASpirit of '80 6-Day Track Race 482.803 km4
13.04 50mi USA1st American River 50 Mile Endurance Run 9:50:17 h95
1979
17.08 24h USADaniel Boone/Lorna Doone 24-Hour Ultra 147.657 km6
17.08 48h USADaniel Boone/Lorna Doone 48-Hour Ultra 147.657 km7
26.05 100km USADavid Copperfield 48-Hour Track Ultramarathon - 100km Split 13:25:04 h9
1978
10.12 60km USASacramento Sixty, PA-AAU 60-K 5:29:20 h19