Gregory Isaac

Born : 1974 Cat. M50 Ultrarunner since 2007

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 ?

United States

51,4%

Rank quotient ?This runner's calculation uses 14 eligible race(s): Σ(rank − 1) = 641; Σ finishers = 1 246. 641 / 1 246 × 100 = 51.44%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed14

Km — ultra races825 km

Longest race100,0 km

1st Lookout Mountain 100 km Race — 20/12/2008

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road19,4%

Trail80,6%

Records

50 km5h08'58 100 km16h03'31 50 mi11h41'42

HISTORY

14 race(s)

Date		Race	Perf.	Rk
2011
19.11	60km	31st NYRR Knickerbocker 60K	7:13:03 h	198
26.03	50km	12th Chicago Lakefront Spring 50km Race	5:42:03 h	80
2010
22.05	8h	1st CRUD 8 Hour Trail Run	51.499 km	10
15.05	50km	7th Dances with Dirt - Gnaw Bone 50 km Ultra	6:53:18 h	38
27.03	50km	11th Chicago Lakefront Spring 50km Race	5:08:58 h	70
2008
20.12	100km	1st Lookout Mountain 100 km Race	16:03:31 h	28
11.10	33mi	3rd Farmdale Trail Run 30 Mile	6:19:07 h	20
21.09	50km	5th Rock Cut Hobo 50K	5:26:26 h	28
11.04	50mi	8th McNaughton 50 Mile Ultra Race	13:36:40 h	38
29.03	30mi	2nd Clinton Lake Ultra	6:46:38 h	53
2007
13.10	33mi	2nd Farmdale Trail Run 30 Mile	6:22:00 h	23
23.09	50km	4th Rock Cut Hobo 50K	5:17:20 h	26
13.04	50mi	7th McNaughton 50 Mile Ultra Race	11:41:42 h	23
31.03	30mi	1st Clinton Lake Ultra	6:15:37 h	20

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	20/12/2008	1st Lookout Mountain 100 km Race	100,00	×4
✓ 2	11/4/2008	8th McNaughton 50 Mile Ultra Race	80,47	×3
✓ 3	13/4/2007	7th McNaughton 50 Mile Ultra Race	80,47	×3
✓ 4	19/11/2011	31st NYRR Knickerbocker 60K	60,00	×2
✓ 5	11/10/2008	3rd Farmdale Trail Run 30 Mile	53,11	×2
✓ 6	13/10/2007	2nd Farmdale Trail Run 30 Mile	53,11	×2
✓ 7	22/5/2010	1st CRUD 8 Hour Trail Run	51,50	×2
✓ 8	26/3/2011	12th Chicago Lakefront Spring 50km Race	50,00	×2
✓ 9	15/5/2010	7th Dances with Dirt - Gnaw Bone 50 km Ultra	50,00	×2
✓ 10	27/3/2010	11th Chicago Lakefront Spring 50km Race	50,00	×2
✓ 11	21/9/2008	5th Rock Cut Hobo 50K	50,00	×2
✓ 12	23/9/2007	4th Rock Cut Hobo 50K	50,00	×2
✓ 13	29/3/2008	2nd Clinton Lake Ultra	48,28	×1
✓ 14	31/3/2007	1st Clinton Lake Ultra	48,28	×1