Masaaki (Mark) Ishikawa
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Born : 1964
Cat. M60 Ultrarunner since 2006
15
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
32
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 ?Canada
Canada59,8%
Rank quotient ?This runner's calculation uses 15 eligible race(s): Σ(rank − 1) = 476; Σ finishers = 796. 476 / 796 × 100 = 59.80%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed15
Km — ultra races1 276 km
> 100 km4
> 160 km2
> 24h2
Longest race160,9 km
15th Haliburton Forest 100 Mile Race — 11/9/2010
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road39,2%
Trail60,8%
HISTORY
16 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 11/9/2010 | 15th Haliburton Forest 100 Mile Race | 160,93 | ×5 |
| ✓ 2 | 29/5/2010 | 18th Sulphur Springs Trail Run 100mi | 160,93 | ×5 |
| ✓ 3 | 7/8/2010 | 4th Dirty girls 24 hour Trail Race | 130,00 | ×4 |
| ✓ 4 | 8/9/2007 | 26th Self-Transcendence 24 Hour Race Ottawa | 124,07 | ×3 |
| ✓ 5 | 5/5/2007 | 7th Toronto Ultra Race 100km | 100,00 | ×3 |
| ✓ 6 | 17/4/2010 | 5th Seaton Trail Run 50 Miles | 80,47 | ×2 |
| ✓ 7 | 23/5/2009 | 17th Sulphur Springs Trail Run 50mi | 80,47 | ×2 |
| ✓ 8 | 6/6/2009 | 17th Self Transcendence 6 Hour Run Kingston | 64,49 | ×2 |
| ✓ 9 | 9/6/2007 | 15th Self Transcendence 6 Hour Run Kingston | 62,12 | ×1 |
| ✓ 10 | 28/10/2006 | 5th Horror Hill 6 Hour Ultra Trail Race | 56,30 | ×1 |
| ✓ 11 | 17/7/2010 | 1st Limberlost 56 km Challenge | 56,00 | ×1 |
| ✓ 12 | 16/10/2010 | 8th Vulture Bait 50 km Trail Race | 50,00 | ×1 |
| ✓ 13 | 19/6/2010 | 18th Niagara Ultra 50 km | 50,00 | ×1 |
| ✓ 14 | 20/6/2009 | 17th Niagara Ultra 50 km | 50,00 | ×1 |
| ✓ 15 | 5/6/2010 | 18th Self Transcendence 6 Hour Run Kingston | 49,90 | ×1 |