Robert Groff
External sources
Loading FFA
Loading MV
FFA diagnostics
Run “Search / refresh FFA” to see each season, HTTP response, candidate and DUV comparison.
MarathonView diagnostics
Run “Refresh MV” to see login, session validation and parser status.
Cached locally. Empty refreshes never erase the last valid snapshot.
13
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
22
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
40,2%
Rank quotient ?This runner's calculation uses 13 eligible race(s): Σ(rank − 1) = 437; Σ finishers = 1 087. 437 / 1 087 × 100 = 40.20%. A win adds 0 to the numerator. Lower is better.
Totals
Ultras completed13
Km — ultra races626 km
Longest race56,0 km
1st Bohemian Alps 56 km Endurance Run — 7/10/1995
Km per year (ultra races)
2022
2023
2024
2025
2026
Race types (share of distance)
Road8,0%
Trail92,0%
Records
HISTORY
13 race(s)| Date | Race | Perf. | Rk | |
|---|---|---|---|---|
| 1997 | ||||
| 18.01 | 50km | 4:59:22 h | 74 | |
| 1995 | ||||
| 07.10 | 56km | 6:16:00 h | 8 | |
| 25.09 | 50km | 6:34:29 h | 23 | |
| 1994 | ||||
| 26.02 | 50km | 6:17:58 h | 17 | |
| 1993 | ||||
| 27.11 | 28mi | 6:36:09 h | 99 | |
| 1991 | ||||
| 30.11 | 28mi | 5:54:09 h | 61 | |
| 1990 | ||||
| 24.11 | 28mi | 5:35:00 h | 27 | |
| 1989 | ||||
| 25.11 | 28mi | 5:17:11 h | 15 | |
| 16.09 | 50km | 5:48:12 h | 29 | |
| 1988 | ||||
| 26.11 | 28mi | 5:56:19 h | 37 | |
| 17.09 | 50km | 6:12:00 h | 25 | |
| 07.08 | 50km | 4:38:49 h | 16 | |
| 1987 | ||||
| 27.11 | 28mi | 5:04:37 h | 19 | |
| Runner | Races in common |
|---|---|
DUV-index calculation details
| # | Date | Race | Credited km | DUV-index+ |
|---|---|---|---|---|
| ✓ 1 | 7/10/1995 | 1st Bohemian Alps 56 km Endurance Run | 56,00 | ×2 |
| ✓ 2 | 18/1/1997 | 19th Jed Smith Ultra Classic - 50 km Race | 50,00 | ×2 |
| ✓ 3 | 25/9/1995 | 2nd Quivering Quads 50K Trail Race | 50,00 | ×2 |
| ✓ 4 | 26/2/1994 | 2nd Sylamore Trail 50k Run | 50,00 | ×2 |
| ✓ 5 | 16/9/1989 | Pacific Crest Trail 50 km | 50,00 | ×2 |
| ✓ 6 | 17/9/1988 | Pacific Crest Trail 50 km | 50,00 | ×2 |
| ✓ 7 | 7/8/1988 | 7th Skyline 50k Endurance Run | 50,00 | ×2 |
| ✓ 8 | 27/11/1993 | 9th Quad Dipsea Trail Run | 45,06 | ×2 |
| ✓ 9 | 30/11/1991 | 7th Quad Dipsea Trail Run | 45,06 | ×2 |
| ✓ 10 | 24/11/1990 | 6th Quad Dipsea Trail Run | 45,06 | ×2 |
| ✓ 11 | 25/11/1989 | 5th Quad Dipsea Trail Run | 45,06 | ×2 |
| ✓ 12 | 26/11/1988 | 4th Quad Dipsea Trail Run | 45,06 | ×2 |
| ✓ 13 | 27/11/1987 | 3rd Quad Dipsea Trail Run | 45,06 | ×2 |