Allison Jeffery
ID 393523
Born : 1975 Cat. W50 Ultrarunner since 2013 USA
28
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
40
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
2
Countries visited ?GBRUnited KingdomUSAUnited States
77,4%
Rank quotient ?This runner's calculation uses 28 eligible race(s): Σ(rank − 1) = 4 339; Σ finishers = 5 604. 4 339 / 5 604 × 100 = 77.43%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed28
Km — ultra races1 863 km
> 100 km2
> 160 km2
Longest race160,9 km
31st Umstead Endurance Run 100 Miles — 28/3/2026

Km per year (ultra races)

161
2 races
2022
194
3 races
2023
424
6 races
2024
232
4 races
2025
216
2 races
2026

Race types (share of distance)

Road6,4%
Trail93,6%

Records

50 km6h31'0950 mi10h47'57100 mi29h33'17

HISTORY

28 race(s)
DateRacePerf.Rk
2026
28.03 100mi USA31st Umstead Endurance Run 100 Miles 29:33:17 h138
21.02 55km USA20th Moab Red Hot 55k 10:35:27 h164
2025
15.11 50km USA3rd NYC Trail Mix 50 km Race 9:17:40 h102
05.04 50mi USA30th Umstead Endurance Run 50 Miles 14:20:41 h93
08.03 50km USA5th Squatchapple 50 km Race 8:59:25 h65
09.02 52km USA12th Black Canyon Trail 50 km Run 9:16:58 h476
2024
16.11 50km USA2nd NYC Trail Mix 50 km Race 8:20:18 h76
21.09 50km USA16th Grindstone 50 km 8:54:17 h168
06.04 100mi USA29th Umstead Endurance Run 100 Miles 29:40:44 h155
09.03 33mi USA4th Squatchapple 33 Mile Race 8:33:24 h53
24.02 50km USA14th Febapple Frozen 50 km 8:05:17 h38
11.02 60.2km USA11th Black Canyon Trail 60 km Run 10:53:16 h316
2023
01.04 50mi USA28th Umstead Endurance Run 50 Miles 12:15:31 h48
11.03 33mi USA3rd Squatchapple 33 Mile Race 8:36:02 h40
19.02 60.2km USA10th Black Canyon Trail 60 km Run 10:13:03 h266
2022
19.11 50mi USA60th JFK 50 Mile 12:28:25 h851
12.02 50mi USA30th Rocky 50 Mile Trail Run 13:16:57 h99
2019
17.11 60km USA39th NYRR Knickerbocker 60K 6:57:58 h178
14.09 50km USA4th Boulder Field 100 - 50 km Ultra Run 7:01:13 h83
2018
24.02 50mi USA5th Antelope Canyon 50 Mile Race 12:30:46 h120
2017
10.06 50km USA1st Endurance Challenge - Massachusetts Trail 50 km 9:46:43 h168
2016
12.11 34mi GBRCoastal Trail Series - Gower Ultra 8:52:34 h113
2015
08.08 50mi USA6th Beast of Burden Summer 50 Miler 10:47:57 h15
2014
31.05 50km USA5th Mayapple 50 km Trail Run 9:11:00 h24
22.03 50km USA5th New Jersey Ultra Festival 50 km Race 6:31:09 h32
2013
16.11 60km USA33rd NYRR Knickerbocker 60K 7:14:40 h202
01.06 50km USA6th Endurance Challenge - Washington D.C. Trail 50 km 7:19:00 h234
23.03 50km USA4th New Jersey Ultra Festival 50 km Race 7:12:41 h50