Mark Langley
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9
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
25
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 ?
Australia
2,8%
Rank quotient ?This runner's calculation uses 9 eligible race(s): Σ(rank − 1) = 123; Σ finishers = 4 470. 123 / 4 470 × 100 = 2.75%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed9
Km — ultra races689 km
> 100 km2
> 24h1
Longest race120,7 km
Red's Backyard Ultra — 5/8/2023
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Trail82,5%
Elim.17,5%
Wins & podiums (ultra)
🏆 Win1
🏆 Win M1
🏅 Top 31
🏅 Top 3 M1
Longest winning streak1
Current streak0
HISTORY
10 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 02.08 | 100km | 11:03:57 h | 6 | |
| 28.02 | 101km | 14:05:51 h | 15 | |
| 2024 | ||||
| 26.10 | 80km | 6:04:02 h | 1 🏆 | |
| 24.02 | 50km | 4:18:42 h | 10 | |
| 2023 | ||||
| 28.10 | 80km | 6:48:56 h | 7 | |
| 05.08 | Backyard Ultra | 120.708 km (18h) | 15 | |
| 11.03 | 45km | 4:30:31 h | 41 | |
| 2022 | ||||
| 15.12 | 50km | 4:30:09 h | 10 | |
| 29.10 | 50km | 4:49:14 h | 33 | |
| 24.07 | 62km | 5:45:10 h | 4 | |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 5/8/2023 | Red's Backyard Ultra | 120,71 | ×4 |
| ✓ 2 | 28/2/2026 | 10th Gone Nuts 101 km Ultra | 101,00 | ×4 |
| ✓ 3 | 2/8/2026 | 13th Sri Chinmoy Canberra Trail 100 | 100,00 | ×4 |
| ✓ 4 | 26/10/2024 | Bondi to Manly Ultra | 80,00 | ×3 |
| ✓ 5 | 28/10/2023 | Bondi to Manly Ultra | 80,00 | ×3 |
| ✓ 6 | 24/7/2022 | Summit Shoalhaven Trail Run | 62,00 | ×2 |
| ✓ 7 | 15/12/2022 | 1st Ultra-Trail Kosciuszko by UTMB - Kosci 50 | 50,00 | ×2 |
| ✓ 8 | 29/10/2022 | 9th Ultra-Trail Australia 50 km | 50,00 | ×2 |
| ✓ 9 | 11/3/2023 | Six Foot Track | 45,00 | ×1 |