Brian Duffy
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Born : 1992
Cat. M23 Ultrarunner since 2025
3
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
12
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 ?United States
United States10,6%
Rank quotient ?This runner's calculation uses 3 eligible race(s): Σ(rank − 1) = 72; Σ finishers = 681. 72 / 681 × 100 = 10.57%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed3
Km — ultra races149 km
Longest race50,0 km
46th Avalon Benefit 50 km Run — 10/1/2026
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Trail100,0%
Records
HISTORY
3 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 2026 | ||||
| 19.06 | 12h | 9th Moonlight on Mount Ascension Trail Run |
49.084 km | 17 |
| 10.01 | 50km | 46th Avalon Benefit 50 km Run |
5:19:16 h | 20 |
| 2025 | ||||
| 01.03 | 50km | 16th Red Mountain 50K |
5:35:15 h | 38 |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 10/1/2026 | 46th Avalon Benefit 50 km Run | 50,00 | ×4 |
| ✓ 2 | 1/3/2025 | 16th Red Mountain 50K | 50,00 | ×4 |
| ✓ 3 | 19/6/2026 | 9th Moonlight on Mount Ascension Trail Run | 49,08 | ×4 |