William Lawder
ID 232773
Born : 1947 Cat. M75 Ultrarunner since 1977 USA
50
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
53
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 ?GBRUnited KingdomITAItalyUSAUnited States
4,3%
Rank quotient ?This runner's calculation uses 55 eligible race(s): Σ(rank − 1) = 217; Σ finishers = 4 995. 217 / 4 995 × 100 = 4.34%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed57
Km — ultra races4 287 km
> 100 km4
> 160 km4
Longest race160,9 km
1st New York Pioneer Memorial 100 Mile Trek — 23/5/1981

Km per year (ultra races)

2022
2023
2024
2025
2026

Race types (share of distance)

Road71,7%
Trail24,5%
Stage3,8%

Wins & podiums (ultra)

🏆 Win13
🏆 Win M13
🏅 Top 329
🏅 Top 3 M29
Longest winning streak2
Current streak0

Records

50 km3h19'56100 km7h05'5350 mi5h38'55100 mi11h12'45

HISTORY

55 race(s)
DateRacePerf.Rk
1996
23.03 50km USA8th The HAT Run 50K 4:28:45 h10
1988
12.08 50km USAElkins Park 50 km Race 4:41:12 h2 🥈
29.05 100km ITA16^ 100 km del Passatore, Firenze-Faenza 9:15:22 h56
1987
21.11 50mi USA25th JFK 50 Mile 7:12:48 h8
11.10 100km USADel Passatore 100 km Run/Walk 8:10:15 h4
1984
03.11 100km USA5th Great Philadelphia to Atlantic City Road Race 7:05:53 h2 🥈
07.10 36mi USANational Capital 36 Mile Run 3:44:34 h1 🏆
26.05 40mi USA5th Forest Park 40 Mile 4:30:25 h1 🏆
28.04 50km USA6th Sybil Ludington 50 km Run 3:29:02 h2 🥈
1983
05.06 40mi USA4th Forest Park 40 Mile 4:25:15 h1 🏆
22.05 50mi USA13th Metropolitan 50 Mile Race 5:50:50 h2 🥈
1982
20.11 50mi USA20th JFK 50 Mile 6:03:51 h3 🥉
24.10 60km USAUnited Way Runfest 60 km 4:14:10 h1 🏆
17.10 50mi USABroken Spoke 50 Mile 5:51:00 h1 🏆
10.10 36mi USADannon Two Bridges 3:54:02 h7
26.09 50mi USA2nd The Breakers Marathon - Nifty Fifty Miles 5:45:08 h1 🏆
18.09 36mi USANorth Poconos Two Bridges 36 Mile 3:57:49 h1 🏆
29.05 40mi USA3rd Forest Park 40 Mile 4:28:18 h4
02.05 50mi USA9th Lake Waramaug 50mi Ultra Marathon 5:54:28 h9
24.04 50km USA4th Sybil Ludington 50 km Run 3:28:04 h2 🥈
03.04 50mi USACapital City 50 Mile Road Race 6:13:05 h1 🏆
1981
21.11 50mi USA19th JFK 50 Mile 6:19:59 h2 🥈
11.10 36mi USADannon Two Bridges 3:47:41 h6
05.09 40mi USA2nd Forest Park 40 Mile 4:30:02 h5
29.08 49mi USALaurel 50 Miler 5:59:50 h2 🥈
09.08 36mi USATwo Bridges 36 Mile Run 4:06:06 h1 🏆
23.05 100mi/3stages USA1st New York Pioneer Memorial 100 Mile Trek 11:12:45 h2 🥈
03.05 50mi USA8th Lake Waramaug 50mi Ultra Marathon 5:41:27 h4
26.04 50km USA3rd Sybil Ludington 50 km Run 3:19:56 h1 🏆
28.03 50mi USACapitol-to-Capitol 50 Miler 5:50:38 h1 🏆
07.03 60km USA4th NYRR Knickerbocker 60K 4:13:38 h6
1980
22.11 50mi USA18th JFK 50 Mile 6:22:54 h2 🥈
16.11 50mi USA1st Nifty Fifty Miles 6:09:59 h7
12.10 36mi USADannon Two Bridges 3:47:13 h2 🥈
14.06 100mi USA2nd Old Dominion 100 Mile Endurance Run 17:55:50 h3 🥉
01.06 40mi USA1st Forest Park 40 Mile 4:25:30 h3 🥉
04.05 50mi USA7th Lake Waramaug 50mi Ultra Marathon 5:38:55 h2 🥈
26.04 50km USA2nd Sybil Ludington 50 km Run 3:25:09 h1 🏆
19.04 50mi USACapitol-to-Capitol 50 Miler 6:24:00 h3 🥉
08.03 60km USA3rd NYRR Knickerbocker 60K 4:04:55 h6
1979
17.11 50mi USA17th JFK 50 Mile 6:08:54 h1 🏆
03.11 50mi USA9th Metropolitan 50 Mile Race 5:53:15 h6
28.10 50mi USASchaefer 50-Mile 7:25:48 h10
14.10 36mi USADannon Two Bridges 3:49:54 h4
09.06 100mi USA1st Old Dominion 100 Mile Endurance Run 18:52:56 h4
06.05 50mi USA6th Lake Waramaug 50mi Ultra Marathon 5:50:48 h5
03.03 60km USA2nd NYRR Knickerbocker 60K 4:15:24 h7
1978
18.11 50mi USA16th JFK 50 Mile 6:20:51 h2 🥈
01.10 86.1km GBR28th London to Brighton Road Race 6:12:00 h16
23.06 100mi USA1st Unisphere 100-Mile 15:37:22 h5
07.05 50mi USA5th Lake Waramaug 50mi Ultra Marathon 6:20:33 h9
11.03 60km USA1st NYRR Knickerbocker 60K 4:17:39 h8
1977
19.11 50mi USA15th JFK 50 Mile 6:56:07 h9
05.11 50mi USA7th Metropolitan 50 Mile Race 5:52:23 h4
15.05 50mi USA4th Lake Waramaug 50mi Ultra Marathon 6:18:16 h4