Mark Harris
External sources
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11
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
26
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 ?
Canada
United States
59,9%
Rank quotient ?This runner's calculation uses 11 eligible race(s): Σ(rank − 1) = 731; Σ finishers = 1 220. 731 / 1 220 × 100 = 59.92%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed11
Km — ultra races810 km
> 100 km1
> 160 km1
Longest race160,9 km
7th Burning River 100 Mile Endurance Run — 27/7/2013
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road6,2%
Trail93,8%
HISTORY
11 race(s)| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 27/7/2013 | 7th Burning River 100 Mile Endurance Run | 160,93 | ×6 |
| ✓ 2 | 29/9/2012 | 2nd Ultra Race of Champions (UROC) 100K | 100,00 | ×3 |
| ✓ 3 | 3/12/2016 | 10th Endurance Challenge - California Trail 50 Mile | 80,47 | ×3 |
| ✓ 4 | 16/7/2016 | 3rd Endurance Challenge - Ontario Trail 50 Mile | 80,47 | ×3 |
| ✓ 5 | 12/7/2014 | 1st Endurance Challenge - Ontario Trail 50 Mile | 80,47 | ×3 |
| ✓ 6 | 27/10/2007 | 6th Horror Hill 6 Hour Ultra Trail Race | 55,21 | ×2 |
| ✓ 7 | 30/10/2004 | 3rd Horror Hill 6 Hour Ultra Trail Race | 52,90 | ×2 |
| ✓ 8 | 30/4/2016 | 8th Pick Your Poison 50K Trail Run | 50,00 | ×1 |
| ✓ 9 | 5/7/2014 | 8th Creemore Vertical Challenge 50 km Trail Run | 50,00 | ×1 |
| ✓ 10 | 8/9/2012 | 17th Haliburton Forest 50 km Race | 50,00 | ×1 |
| ✓ 11 | 25/6/2005 | 13th Niagara Ultra 50 km | 50,00 | ×1 |