Greg Duff
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Born : 1969
Cat. M55 Ultrarunner since 2005
10
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
22
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 States33,0%
Rank quotient ?This runner's calculation uses 10 eligible race(s): Σ(rank − 1) = 386; Σ finishers = 1 168. 386 / 1 168 × 100 = 33.05%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed10
Km — ultra races556 km
Longest race80,5 km
7th Diablo Endurance Run — 19/4/2009
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Trail100,0%
Records
HISTORY
10 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2010 | ||||
| 23.05 | 50km | 23rd Ohlone 50K Wilderness Run |
6:58:33 h | 94 |
| 2009 | ||||
| 31.05 | 50km | 22nd Ohlone 50K Wilderness Run |
6:38:59 h | 48 |
| 19.04 | 50mi | 7th Diablo Endurance Run |
12:39:01 h | 36 |
| 07.02 | 50km | 8th Woodside Trail Run 50K |
4:55:43 h | 22 |
| 2008 | ||||
| 29.11 | 28mi | 24th Quad Dipsea Trail Run |
5:51:32 h | 71 |
| 11.10 | 50mi | 26th Dick Collins Firetrails 50 Mile |
9:22:37 h | 48 |
| 03.08 | 50km | 27th Skyline 50k Endurance Run |
5:05:17 h | 23 |
| 19.07 | 50km | 4th Sequoia Trail Run |
5:21:06 h | 7 |
| 2007 | ||||
| 06.10 | 50km | 1st Endurance Challenge - Washington D.C. Trail 50 km |
7:13:18 h | 40 |
| 2005 | ||||
| 22.10 | 50km | 1st Montaña de Oro 50 km Race |
5:46:37 h | 7 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 19/4/2009 | 7th Diablo Endurance Run | 80,47 | ×3 |
| ✓ 2 | 11/10/2008 | 26th Dick Collins Firetrails 50 Mile | 80,47 | ×3 |
| ✓ 3 | 23/5/2010 | 23rd Ohlone 50K Wilderness Run | 50,00 | ×2 |
| ✓ 4 | 31/5/2009 | 22nd Ohlone 50K Wilderness Run | 50,00 | ×2 |
| ✓ 5 | 7/2/2009 | 8th Woodside Trail Run 50K | 50,00 | ×2 |
| ✓ 6 | 3/8/2008 | 27th Skyline 50k Endurance Run | 50,00 | ×2 |
| ✓ 7 | 19/7/2008 | 4th Sequoia Trail Run | 50,00 | ×2 |
| ✓ 8 | 6/10/2007 | 1st Endurance Challenge - Washington D.C. Trail 50 km | 50,00 | ×2 |
| ✓ 9 | 22/10/2005 | 1st Montaña de Oro 50 km Race | 50,00 | ×2 |
| ✓ 10 | 29/11/2008 | 24th Quad Dipsea Trail Run | 45,06 | ×2 |