John Black
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Born : 1956
Cat. M70 Ultrarunner since 2017
9
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
20
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 ?United Kingdom
Italy
United KingdomItaly42,2%
Rank quotient ?This runner's calculation uses 9 eligible race(s): Σ(rank − 1) = 1 041; Σ finishers = 2 469. 1 041 / 2 469 × 100 = 42.16%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed9
Km — ultra races500 km
Longest race80,5 km
Dartmoor Way Granite 50mi — 11/11/2023
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road20,0%
Trail80,0%
Records
HISTORY
9 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2023 | ||||
| 11.11 | 50mi | Dartmoor Way Granite 50mi |
14:43:21 h | 46 |
| 07.10 | 50km | 3rd Epping Forest 50 km |
5:25:02 h | 63 |
| 25.06 | 50km | 46a Pistoia-Abetone Ultramarathon |
6:22:15 h | 386 |
| 2022 | ||||
| 18.06 | 50km | 2nd Lea Valley 50 km |
4:47:52 h | 33 |
| 2021 | ||||
| 09.10 | 50km | 1st Epping Forest 50 km |
5:11:53 h | 37 |
| 10.07 | 31mi | Humanity Direct Chiltern Challenge |
5:27:50 h | 38 |
| 19.06 | 50km | 1st Lea Valley 50 km |
4:37:49 h | 54 |
| 01.05 | 43mi | 13th Country to Capital |
7:05:01 h | 77 |
| 2017 | ||||
| 25.06 | 50km | 42a Pistoia-Abetone Ultramarathon |
5:57:58 h | 316 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 11/11/2023 | Dartmoor Way Granite 50mi | 80,47 | ×4 |
| ✓ 2 | 1/5/2021 | 13th Country to Capital | 69,20 | ×3 |
| ✓ 3 | 7/10/2023 | 3rd Epping Forest 50 km | 50,00 | ×2 |
| ✓ 4 | 25/6/2023 | 46a Pistoia-Abetone Ultramarathon | 50,00 | ×2 |
| ✓ 5 | 18/6/2022 | 2nd Lea Valley 50 km | 50,00 | ×2 |
| ✓ 6 | 9/10/2021 | 1st Epping Forest 50 km | 50,00 | ×2 |
| ✓ 7 | 19/6/2021 | 1st Lea Valley 50 km | 50,00 | ×2 |
| ✓ 8 | 25/6/2017 | 42a Pistoia-Abetone Ultramarathon | 50,00 | ×2 |
| ✓ 9 | 10/7/2021 | Humanity Direct Chiltern Challenge | 49,89 | ×2 |