Yu-Tung (柯俞東) Ko
External sources
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Born : 1983
Cat. M40 Ultrarunner since 2013
13
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
33
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 ?
JapanTaiwan
JapanTaiwan24,7%
Rank quotient ?This runner's calculation uses 13 eligible race(s): Σ(rank − 1) = 1 217; Σ finishers = 4 933. 1 217 / 4 933 × 100 = 24.67%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed18
Km — ultra races1 310 km
> 100 km3
> 160 km1
> 200 km1
Longest race333,0 km
1st Hualien-Taitung Multi-day Ultramarathon — 1/12/2013
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road68,8%
Trail5,7%
Stage25,4%
Wins & podiums (ultra)
🏆 Win3
🏆 Win M3
🏅 Top 33
🏅 Top 3 M3
Longest winning streak1
Current streak0
HISTORY
14 race(s) · 6 stage(s) nested| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 1/12/2013 | 1st Hualien-Taitung Multi-day Ultramarathon | 333,00 | ×10 |
| ✓ 2 | 7/3/2015 | 5th Southern Cross-Island Highway 108 km Ultra Marathon | 108,00 | ×3 |
| ✓ 3 | 8/3/2014 | 4th Southern Cross-Island Highway 108 km Ultra Marathon | 108,00 | ×3 |
| ✓ 4 | 20/9/2015 | 15th Tango 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 5 | 25/1/2015 | 3rd Zhenxibao (Cinsbu) 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 6 | 14/4/2013 | 1st Zhenxibao (Cinsbu) 100 km Ultramarathon | 100,00 | ×3 |
| ✓ 7 | 16/3/2013 | 3rd Southern Cross-Island Highway 100 km Ultra Marathon | 100,00 | ×3 |
| ✓ 8 | 29/11/2025 | 9th Formosa Trail 75km | 75,00 | ×2 |
| ✓ 9 | 3/8/2013 | 1st Shichong Creek Summer Ultramarathon | 72,00 | ×2 |
| ✓ 10 | 16/2/2013 | 2nd Taipei 6hr Ultra Marathon Saturday Run | 64,13 | ×1 |
| ✓ 11 | 31/1/2014 | 7th Tainan Branch Friendship Cup Chinese New Year Marathon | 54,00 | ×1 |
| ✓ 12 | 17/11/2013 | 3rd Flex Power National 50K Track Taipei | 50,00 | ×1 |
| ✓ 13 | 6/4/2014 | 1st Mingde Reservoir Ultramarathon | 45,60 | ×1 |