Jacob Niebaum
ID 75320
Born : 1966 Cat. M60 Ultrarunner since 1994 USA
23
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
33
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
6,8%
Rank quotient ?This runner's calculation uses 23 eligible race(s): Σ(rank − 1) = 281; Σ finishers = 4 143. 281 / 4 143 × 100 = 6.78%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed23
Km — ultra races1 454 km
Longest race100,0 km
4th Miwok 100k Trail race — 1/5/1999

Km per year (ultra races)

2022
2023
2024
2025
2026

Race types (share of distance)

Road13,8%
Trail86,2%

Wins & podiums (ultra)

🏆 Win1
🏆 Win M1
🏅 Top 37
🏅 Top 3 M7
Longest winning streak1
Current streak0

Records

50 km3h32'12100 km8h23'3550 mi5h57'08

HISTORY

24 race(s)
DateRacePerf.Rk
2015
25.04 50km USASierra Azul Trail Challenge 6:30:14 h2 🥈
11.01 50km USA5th Crystal Springs 50 km Winter Trail Run 5:01:11 h14
2014
26.04 50km USASierra Azul Trail Challenge 6:30:14 h2 🥈
2008
06.12 50km USA7th Woodside Trail Run 50K 5:03:21 h14
2005
15.10 50mi USA23rd Dick Collins Firetrails 50 Mile 9:38:48 h52
1999
16.05 50km USA12th Ohlone 50K Wilderness Run 4:42:19 h2 🥈
08.05 50mi USA16th Quicksilver 50 Mile Endurance Run 7:58:42 h4
01.05 100km USA4th Miwok 100k Trail race 9:56:35 h6
10.04 50mi USA20th American River 50 Mile Endurance Run 7:34:59 h43
13.03 50km USA10th Way Too Cool 50K Endurance Run 4:56:32 h74
1998
14.11 50mi USA3rd Helen Klein Ultra Classic 50mi 5:57:08 h5
29.08 31.5mi USA1st Tamalpa Headlands 50K 4:09:43 h1 🏆
01.08 50km USA17th Skyline 50k Endurance Run 3:59:20 h3 🥉
04.04 50mi USA19th American River 50 Mile Endurance Run 6:37:41 h11
14.03 50km USA9th Way Too Cool 50K Endurance Run 4:18:24 h18
1997
29.11 28mi USA13th Quad Dipsea Trail Run 4:55:58 h17
19.04 50mi USA12th Ruth Anderson Ultra 100km - 50mi Split 6:38:57 h4
19.04 100km USA12th Ruth Anderson Ultra 100km 8:23:35 h4
05.04 50mi USA18th American River 50 Mile Endurance Run 6:40:22 h12
1996
14.12 50km USA1st Hunter S. Thompson Fear & Loathing 50 km 4:32:08 h5
30.11 28mi USA12th Quad Dipsea Trail Run 4:22:17 h3 🥉
12.10 50mi USA14th Dick Collins Firetrails 50 Mile 7:35:57 h4
03.08 50km USA15th Skyline 50k Endurance Run 4:00:05 h3 🥉
1994
05.02 50km USA16th Jed Smith Ultra Classic - 50 km Race 3:32:12 h5