Derek Rosner

Born : 1974 Cat. M50 Ultrarunner since 2008

DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.

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

Countries visited ?

Andorra

Italy

Switzerland

United States

61,7%

Rank quotient ?This runner's calculation uses 18 eligible race(s): Σ(rank − 1) = 3 030; Σ finishers = 4 912. 3 030 / 4 912 × 100 = 61.69%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed18

Km — ultra races1 318 km

> 100 km4

> 160 km1

> 24h1

Longest race160,9 km

4th Centurion Ultra Run — 29/6/2024

Km per year (ultra races)

100

2022

434

2023

261

2024

2025

206

2026

Race types (share of distance)

Trail100,0%

Wins & podiums (ultra)

🏆 Win0

🏆 Win M0

🏅 Top 31

🏅 Top 3 M2

Longest winning streak0

Current streak0

Records

50 km5h40'00 100 km15h58'57 50 mi10h59'13

HISTORY

18 race(s)

Date		Race	Perf.	Rk
2026
28.08	101km	20ème Courmayeur-Champex-Chamonix	25:51:19 h	1199
24.07	50km	19th Speedgoat 50k	11:27:23 h	410
07.03	55km	12th Antelope Canyon 55 km Race	9:00:28 h	134
2024
09.11	50km	4th Red Rock Canyon 50 km Race	7:14:25 h	31
29.06	33h	4th Centurion Ultra Run	160.934 km	10
13.04	50km	15th Traprock 50k Ultramarathon	7:41:06 h	50
2023
04.11	100km	6th Fall Back into the Trails	15:58:57 h	8
15.09	113km	2nd Wildstrubel by UTMB - 100K	24:50:33 h	416
24.06	105km	3ème Trail 100 Andorra by UTMB - Ultra 105km	30:32:23 h	343
27.05	10h	6th CT Trailmixers Spring Fling 600 Trail Race	65.661 km	3 🥉
29.04	50.1km	10th The Canyons Endurance 50 km Run	5:40:00 h	89
2022
05.11	50km	5th Fall Back into the Trails	5:45:52 h	4
16.04	50km	13th Traprock 50k Ultramarathon	6:46:43 h	17
2015
20.06	54mi	3rd Manitou's Revenge Ultramarathon	20:50:55 h	59
18.04	50km	6th Traprock 50k Ultramarathon	5:54:02 h	15
2014
19.10	50km	7th Bimblers Bluff 50k	5:52:25 h	21
2013
04.05	50mi	6th Endurance Challenge - New York Trail 50 Miles	10:59:13 h	73
2008
26.07	31mi	6th Jay Mountain Marathon	8:48:37 h	166

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	29/6/2024	4th Centurion Ultra Run	160,93	×5
✓ 2	15/9/2023	2nd Wildstrubel by UTMB - 100K	113,00	×3
✓ 3	24/6/2023	3ème Trail 100 Andorra by UTMB - Ultra 105km	105,00	×3
✓ 4	28/8/2026	20ème Courmayeur-Champex-Chamonix (CCC)	101,00	×3
✓ 5	4/11/2023	6th Fall Back into the Trails	100,00	×3
✓ 6	20/6/2015	3rd Manitou's Revenge Ultramarathon	86,90	×2
✓ 7	4/5/2013	6th Endurance Challenge - New York Trail 50 Miles	80,47	×2
✓ 8	27/5/2023	6th CT Trailmixers Spring Fling 600 Trail Race	65,66	×2
✓ 9	7/3/2026	12th Antelope Canyon 55 km Race	55,00	×1
✓ 10	29/4/2023	10th The Canyons Endurance 50 km Run	50,10	×1
✓ 11	24/7/2026	19th Speedgoat 50k	50,00	×1
✓ 12	9/11/2024	4th Red Rock Canyon 50 km Race	50,00	×1
✓ 13	13/4/2024	15th Traprock 50k Ultramarathon	50,00	×1
✓ 14	5/11/2022	5th Fall Back into the Trails	50,00	×1
✓ 15	16/4/2022	13th Traprock 50k Ultramarathon	50,00	×1
✓ 16	18/4/2015	6th Traprock 50k Ultramarathon	50,00	×1
✓ 17	19/10/2014	7th Bimblers Bluff 50k	50,00	×1
✓ 18	26/7/2008	6th Jay Mountain Marathon	49,89	×1