J. Ron Bentley
ID 279656
Born : 1930 Cat. M95 Ultrarunner since 1963 GBR
41
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
50
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
3
Countries visited ?FINFinlandGBRUnited KingdomRSASouth Africa
15,4%
Rank quotient ?This runner's calculation uses 41 eligible race(s): Σ(rank − 1) = 601; Σ finishers = 3 899. 601 / 3 899 × 100 = 15.41%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed41
Km — ultra races3 298 km
> 100 km4
> 160 km4
> 200 km1
> 24h2
Longest race259,6 km
Walton-on-Thames 24 Hours Track Race — 3/11/1973

Km per year (ultra races)

2022
2023
2024
2025
2026

Race types (share of distance)

Road95,1%
?4,9%

Wins & podiums (ultra)

🏆 Win4
🏆 Win M4
🏅 Top 37
🏅 Top 3 M7
Longest winning streak2
Current streak0

Records

100 km7h27'40100 mi12h37'5524 h259,60 km

HISTORY

41 race(s) · 6 split(s) nested
DateRacePerf.Rk
1984
04.02 24h GBR24 Hour Indoor Race Milton Keynes 161.280 km17
1983
27.08 36mi GBRTwo Bridges race 4:18:07 h31
1982
28.08 36mi GBRTwo Bridges race 5:01:02 h79
1981
29.08 36mi GBRTwo Bridges race 4:33:39 h50
1980
28.09 87.3km GBR30th London to Brighton Road Race 6:49:24 h36
23.08 36mi GBRTwo Bridges race 4:15:44 h32
1979
25.08 36mi GBRTwo Bridges race 4:14:18 h28
1978
26.08 36mi GBRTwo Bridges race 4:28:54 h40
1977
27.08 36mi GBRTwo Bridges race 4:08:23 h23
1976
06.11 100km GBR100 km Crystal Palace Track Race 7:33:41 h6
26.09 85.1km GBR26th London to Brighton Road Race 6:04:15 h11
21.08 36mi GBRTwo Bridges race 4:03:28 h13
1975
25.10 100mi GBRAccolade 100 - 100 Miles Track Running Race 13:29:56 h7
28.09 84.7km GBR25th London to Brighton Road Race 6:05:01 h23
26.07 37.4mi GBR12th 40 mile road race - Woodford to Southend 4:20:19 h7
31.05 87km RSA50th Comrades Marathon - Up Run 6:39:00 h33
1974
29.09 84.7km GBR24th London to Brighton Road Race 5:37:52 h6
24.08 36mi GBRTwo Bridges race 3:48:26 h11
27.07 37.4mi GBR11th 40 mile road race - Woodford to Southend 4:05:53 h4
05.07 100km FIN3. Suomi-juoksu 100 km, Hartola 7:27:40 h3 🥉
27.05 39.5mi GBR20th Isle of Man TT course 40 miler 4:09:59 h1 🏆
1973
03.11 24h GBRWalton-on-Thames 24 Hours Track Race 259.603 km1 🏆
30.09 84.7km GBR23rd London to Brighton Road Race 5:46:50 h10
1972
28.10 40mi GBRNos Galan 40 Mile Track Race Cardiff 4:42:36 h10
19.08 36mi GBRTwo Bridges race 4:10:03 h24
03.06 90km RSA47th Comrades Marathon - Up Run 6:24:14 h13
1971
23.10 100mi GBRRadox 100 Mile Track Race 12:37:55 h1 🏆
21.08 36mi GBRTwo Bridges race 3:59:09 h15
31.07 37.4mi GBR8th 40 mile road race - Woodford to Southend 4:40:06 h11
31.05 39.5mi GBR17th Isle of Man TT course 40 miler 4:06:57 h3 🥉
08.05 44mi GBRExeter To Plymouth 44 Miles 5:09:30 h4
1970
31.10 40mi GBR40 Mile Track Race Cardiff 4:14:30 h4
27.09 84.7km GBR20th London to Brighton Road Race 6:02:39 h5
22.08 36mi GBRTwo Bridges race 3:42:15 h3 🥉
09.05 44mi GBRExeter To Plymouth 44 Miles 4:41:23 h1 🏆
1969
13.09 37.8mi GBR6th 40 mile road race - Woodford to Southend 4:15:53 h7
23.08 36mi GBRTwo Bridges race 3:51:15 h6
1968
24.08 36mi GBRTwo Bridges race 3:58:53 h4
1966
24.09 84.5km GBR16th London to Brighton Road Race 6:28:32 h23
1964
26.09 84.5km GBR14th London to Brighton Road Race 7:07:22 h23
1963
31.08 30mi GBRSouth London Harriers 30 Mile 3:26:44 h13