James Jacobs
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Born : 1967
Cat. M55 Ultrarunner since 2011
17
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
25
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 ?United States
United States33,9%
Rank quotient ?This runner's calculation uses 17 eligible race(s): Σ(rank − 1) = 1 058; Σ finishers = 3 125. 1 058 / 3 125 × 100 = 33.86%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed17
Km — ultra races928 km
Longest race80,5 km
11th Lake Sonoma 50 Mile Race — 13/4/2019
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Trail100,0%
Records
HISTORY
17 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2019 | ||||
| 13.04 | 50mi | 11th Lake Sonoma 50 Mile Race |
11:15:24 h | 149 |
| 09.03 | 50km | 8th Marin Ultra Challenge 50 km Race |
5:16:14 h | 44 |
| 2018 | ||||
| 25.08 | 31.5mi | 19th Tamalpa Headlands 50K |
6:30:14 h | 54 |
| 14.04 | 50mi | 10th Lake Sonoma 50 Mile Race |
11:06:21 h | 147 |
| 10.03 | 50km | 7th Marin Ultra Challenge 50 km Race |
5:23:09 h | 49 |
| 2017 | ||||
| 25.11 | 28mi | 33rd Quad Dipsea Trail Run |
6:37:56 h | 115 |
| 2016 | ||||
| 26.11 | 28mi | 32nd Quad Dipsea Trail Run |
6:03:57 h | 73 |
| 24.09 | 50km | 5th Berkeley Trail Adventure |
7:16:27 h | 27 |
| 2015 | ||||
| 25.07 | 50mi | 17th Siskiyou Out Back 50 Miles Trail Run |
11:12:17 h | 65 |
| 09.05 | 50km | 32nd Quicksilver 50 km Endurance Run |
5:47:52 h | 24 |
| 2014 | ||||
| 29.11 | 28mi | 30th Quad Dipsea Trail Run |
6:04:37 h | 67 |
| 23.08 | 31.5mi | 15th Tamalpa Headlands 50K |
5:50:46 h | 52 |
| 2013 | ||||
| 29.12 | 50km | 12th Woodside Trail Run 50K |
5:17:18 h | 24 |
| 30.11 | 28mi | 29th Quad Dipsea Trail Run |
6:09:28 h | 86 |
| 10.08 | 50km | 8th Montaña de Oro 50 km Race |
7:14:49 h | 16 |
| 2012 | ||||
| 24.11 | 28mi | 28th Quad Dipsea Trail Run |
6:21:32 h | 69 |
| 2011 | ||||
| 01.05 | 60km | 11th Mount Diablo 60k |
9:41:10 h | 14 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 13/4/2019 | 11th Lake Sonoma 50 Mile Race | 80,47 | ×3 |
| ✓ 2 | 14/4/2018 | 10th Lake Sonoma 50 Mile Race | 80,47 | ×3 |
| ✓ 3 | 25/7/2015 | 17th Siskiyou Out Back 50 Miles Trail Run | 80,47 | ×3 |
| ✓ 4 | 1/5/2011 | 11th Mount Diablo 60k | 60,00 | ×2 |
| ✓ 5 | 25/8/2018 | 19th Tamalpa Headlands 50K | 50,69 | ×2 |
| ✓ 6 | 23/8/2014 | 15th Tamalpa Headlands 50K | 50,69 | ×2 |
| ✓ 7 | 9/3/2019 | 8th Marin Ultra Challenge 50 km Race | 50,00 | ×2 |
| ✓ 8 | 10/3/2018 | 7th Marin Ultra Challenge 50 km Race | 50,00 | ×2 |
| ✓ 9 | 24/9/2016 | 5th Berkeley Trail Adventure | 50,00 | ×2 |
| ✓ 10 | 9/5/2015 | 32nd Quicksilver 50 km Endurance Run | 50,00 | ×2 |
| ✓ 11 | 29/12/2013 | 12th Woodside Trail Run 50K | 50,00 | ×2 |
| ✓ 12 | 10/8/2013 | 8th Montaña de Oro 50 km Race | 50,00 | ×2 |
| ✓ 13 | 25/11/2017 | 33rd Quad Dipsea Trail Run | 45,06 | ×1 |
| ✓ 14 | 26/11/2016 | 32nd Quad Dipsea Trail Run | 45,06 | ×1 |
| ✓ 15 | 29/11/2014 | 30th Quad Dipsea Trail Run | 45,06 | ×1 |
| ✓ 16 | 30/11/2013 | 29th Quad Dipsea Trail Run | 45,06 | ×1 |
| ✓ 17 | 24/11/2012 | 28th Quad Dipsea Trail Run | 45,06 | ×1 |