Lauren Jefferson
ID 163043
Born : 1974 Cat. W50 Ultrarunner since 2001 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
1
Countries visited ?USAUnited States
25,4%
Rank quotient ?This runner's calculation uses 28 eligible race(s): Σ(rank − 1) = 727; Σ finishers = 2 858. 727 / 2 858 × 100 = 25.44%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed28
Km — ultra races1 934 km
> 100 km2
> 160 km2
> 24h1
Longest race164,2 km
14th Burning River 100 Mile Endurance Run — 22/8/2020

Km per year (ultra races)

64
1 race
2022
456
5 races
2023
2024
2025
120
2 races
2026

Race types (share of distance)

Road2,6%
Trail97,4%

Wins & podiums (ultra)

🏆 Win0
🏆 Win F5
🏅 Top 32
🏅 Top 3 F14
Longest winning streak0
Current streak0

Records

50 km4h54'57100 km12h52'5350 mi9h39'39100 mi28h55'5212 h75,64 km24 h49,89 km

HISTORY

28 race(s)
DateRacePerf.Rk
2026
11.07 10h USA5th Windsor Castle 10 Hour Run 69.848 km10
16.05 24h USA18th 3 Days at the Fair 24 Hour Race 49.889 km41
2023
04.11 100mi USA16th Pinhoti 100 Mile 28:55:52 h86
30.09 50mi USA10th Pilot Mountain to Hanging Rock 50M Ultra 11:11:59 h12
17.06 40mi USA20th Highlands Sky 40M Trail Run 8:18:36 h27
08.04 50km USA7th Eagleton Mine Camp Trail Challenge 6:08:08 h6
07.01 100km USA23rd Bandera 100 km Endurance Run 12:52:53 h59
2022
17.09 40mi USA12th Odyssey Trail Running Rampage 40 Mile 7:54:38 h2 🥈
2021
24.04 50mi USA5th Big Turtle 50 Miler 9:50:42 h14
2020
01.11 32.8mi USA10th Fire on the Mountain 50k Ultra Marathon 6:33:29 h9
22.08 102mi USA14th Burning River 100 Mile Endurance Run 26:49:18 h42
2019
05.10 100km USA8th Cuyamaca 100 km Endurance Run 13:40:33 h38
24.08 50mi USA15th Baker Trail 50 Mile UltraChallenge 9:39:39 h9
06.07 12h USA7th Cacapon 12 Hour Challenge 75.639 km4
27.04 50mi USA12th Endurance Challenge - Washington D.C. Trail 50 Miles 10:16:20 h60
31.03 50km USA2nd Greenbrier 50k Fun Run 6:10:41 h13
2018
08.09 40mi USA9th Odyssey Trail Running Rampage 40 Mile 8:33:05 h8
07.07 50km USA8th Golden Gate 50 km Summer Trail Run 6:12:38 h17
05.05 50km USA1st Gateway Trail 50km Race 6:25:02 h11
24.03 50km USA11th Terrapin Mountain 50 km Race 6:27:14 h62
03.02 8h USA13th 8 Hour Adventure Trail Run 46.188 km67
2017
02.12 50km USA1st King of the Mountain 50km 5:00:50 h7
28.10 50km USA4th Patapsco Valley 50K 5:53:05 h28
2013
01.01 50km USA17th Red Eye 50km 5:54:00 h3 🥉
2002
20.07 50km USA2nd Tahoe Rim Trail 50km Endurance Runs 7:01:44 h49
19.05 50km USA15th Ohlone 50K Wilderness Run 5:45:44 h17
2001
05.08 50km USA20th Skyline 50k Endurance Run 4:54:57 h36
12.05 50km USA18th Quicksilver 50 km Endurance Run 5:14:38 h18