Emma Challis
ID 576441
Born : 1972 Cat. W50 Ultrarunner since 2014 GBR
29
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
35
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 ?GBRUnited Kingdom
52,7%
Rank quotient ?This runner's calculation uses 29 eligible race(s): Σ(rank − 1) = 2 189; Σ finishers = 4 157. 2 189 / 4 157 × 100 = 52.66%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed29
Km — ultra races1 690 km
Longest race100,0 km
Serpent Trail Race 100km — 6/7/2024

Km per year (ultra races)

167
3 races
2022
225
4 races
2023
153
2 races
2024
2025
80
1 race
2026

Race types (share of distance)

Road7,9%
Trail92,1%

Wins & podiums (ultra)

🏆 Win0
🏆 Win F1
🏅 Top 30
🏅 Top 3 F3
Longest winning streak0
Current streak0

Records

50 km4h54'32100 km15h28'2350 mi13h03'4412 h83,69 km

HISTORY

29 race(s)
DateRacePerf.Rk
2026
07.02 50mi GBRHibernal Hills 50 Miles 13:03:44 h55
2024
06.07 100km GBRSerpent Trail Race 100km 15:28:23 h152
24.02 53km GBRTEC Lulworth Cove 53km 10:37:04 h165
2023
16.12 34mi GBRCeltic Ultra 7:14:18 h100
05.03 33mi GBRThe Imber Ultra 6:31:06 h69
25.02 53km GBRTEC Lulworth Cove 53km 8:37:28 h99
21.01 40mi GBRWinter Wychavon Way 8:46:42 h43
2022
20.11 40mi GBRRoly's Run 40mi 9:00:59 h22
11.06 50km GBR3rd Sharpness 50 5:25:24 h10
06.03 33mi GBRThe Imber Ultra 6:34:54 h86
2021
28.12 50km GBR5th Winter Cross Ultra 50km 6:32:17 h92
05.06 50km GBR2nd Sharpness 50 6:08:47 h24
2019
17.08 12h GBRHell On The Humber (HOTH) Endurance Race 12h 83.685 km9
11.08 50km GBRSalisbury 54321 Trail Races 5:32:59 h103
03.03 33mi GBRThe Imber Ultra 6:16:56 h65
20.01 50km GBRGloucester 50km 4:54:32 h20
2018
27.12 45mi GBR3rd Winter Cross Ultra 45mi 8:31:04 h30
12.08 50km GBRSalisbury 54321 Trail Races 5:29:28 h101
07.07 50km GBR3rd Ham & Lyme 50 km Run 6:14:07 h34
11.03 33mi GBRThe Imber Ultra 6:08:51 h59
2017
28.12 45mi GBR2nd Winter Cross Ultra 45mi 8:50:58 h38
17.12 50km GBRPortsmouth Coastal Waterside 50K 4:56:34 h132
13.08 50km GBRSalisbury 54321 Trail Races 5:22:20 h75
08.07 50km GBR2nd Ham & Lyme 50 km Run 6:09:49 h44
2016
28.12 45mi GBR1st Winter Cross Ultra 45mi 8:37:14 h28
14.08 50km GBRSalisbury 54321 Trail Races 5:38:06 h94
2015
20.12 50km GBRPortsmouth Coastal Waterside 50K 5:32:59 h204
23.05 35mi GBROx Ultra 7:45:24 h125
2014
10.08 50km GBRSalisbury 54321 Trails Race 5:59:42 h140