Doug Silk
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Born : 1941
Cat. M85 Ultrarunner since 1978
13
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
29
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 ?South Africa
South Africa78,9%
Rank quotient ?This runner's calculation uses 13 eligible race(s): Σ(rank − 1) = 55 808; Σ finishers = 70 749. 55 808 / 70 749 × 100 = 78.88%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed13
Km — ultra races1 054 km
Longest race91,0 km
57th Comrades Marathon - Down Run — 31/5/1982
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road100,0%
Records
No record for a classic ultra format
HISTORY
13 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 1990 | ||||
| 31.05 | 87km road race | 65th Comrades Marathon - Up Run |
10:45:11 h | 9065 |
| 1988 | ||||
| 31.05 | 87km | 63rd Comrades Marathon - Up Run |
10:35:46 h | 8689 |
| 1987 | ||||
| 31.05 | 87km | 62nd Comrades Marathon - Up Run |
9:27:04 h | 3377 |
| 1986 | ||||
| 31.05 | 89km | 61st Comrades Marathon - Down Run |
10:26:45 h | 7884 |
| 1985 | ||||
| 31.05 | 88km | 60th Comrades Marathon - Up Run |
10:27:43 h | 6434 |
| 06.04 | 56km | 16th Two Oceans Marathon |
5:36:38 h | 3164 |
| 1982 | ||||
| 31.05 | 91km | 57th Comrades Marathon - Down Run |
10:49:52 h | 4459 |
| 1981 | ||||
| 01.06 | 90km | 56th Comrades Marathon - Up Run |
10:19:26 h | 2949 |
| 1980 | ||||
| 31.05 | 90km | 55th Comrades Marathon - Down Run |
10:36:00 h | 3645 |
| 05.04 | 56km | 11th Two Oceans Marathon |
5:37:26 h | 1210 |
| 1979 | ||||
| 31.05 | 87km | 54th Comrades Marathon - Up Run |
9:54:33 h | 2119 |
| 14.04 | 56km | 10th Two Oceans Marathon |
5:29:17 h | 852 |
| 1978 | ||||
| 31.05 | 90km | 53rd Comrades Marathon - Down Run |
9:57:00 h | 1974 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 31/5/1982 | 57th Comrades Marathon - Down Run | 91,00 | ×3 |
| ✓ 2 | 1/6/1981 | 56th Comrades Marathon - Up Run | 90,00 | ×3 |
| ✓ 3 | 31/5/1980 | 55th Comrades Marathon - Down Run | 90,00 | ×3 |
| ✓ 4 | 31/5/1978 | 53rd Comrades Marathon - Down Run | 90,00 | ×3 |
| ✓ 5 | 31/5/1986 | 61st Comrades Marathon - Down Run | 89,00 | ×3 |
| ✓ 6 | 31/5/1985 | 60th Comrades Marathon - Up Run | 88,00 | ×3 |
| ✓ 7 | 31/5/1990 | 65th Comrades Marathon - Up Run (RSA) | 87,00 | ×3 |
| ✓ 8 | 31/5/1988 | 63rd Comrades Marathon - Up Run | 87,00 | ×3 |
| ✓ 9 | 31/5/1987 | 62nd Comrades Marathon - Up Run | 87,00 | ×3 |
| ✓ 10 | 31/5/1979 | 54th Comrades Marathon - Up Run | 87,00 | ×3 |
| ✓ 11 | 6/4/1985 | 16th Two Oceans Marathon | 56,00 | ×1 |
| ✓ 12 | 5/4/1980 | 11th Two Oceans Marathon | 56,00 | ×1 |
| ✓ 13 | 14/4/1979 | 10th Two Oceans Marathon | 56,00 | ×1 |