James Robertson

Born : 1961 Cat. M65 Ultrarunner since 1979

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

61,2%

Rank quotient ?This runner's calculation uses 11 eligible race(s): Σ(rank − 1) = 353; Σ finishers = 577. 353 / 577 × 100 = 61.18%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed11

Km — ultra races1 086 km

> 100 km4

> 160 km1

> 24h2

Longest race160,9 km

DC Road Runners 100 Mile — 1/8/1981

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road92,6%

Trail7,4%

Wins & podiums (ultra)

🏆 Win0

🏆 Win M0

🏅 Top 31

🏅 Top 3 M1

Longest winning streak0

Current streak0

Records

50 km4h04'53 100 km10h18'30 50 mi8h05'59 100 mi23h31'36 12 h114,79 km 24 h131,72 km

HISTORY

11 race(s) · 7 split(s) nested

Date		Race	Perf.	Rk
1984
24.11	100km	Metro 100 km	10:30:32 h	15
1982
13.11	50km	Prospect Park 50 km	4:04:53 h	3 🥉
30.10	24h	4th Sri Chinmoy 24 Hour Race	131.715 km	14
30.10	50km	4th Sri Chinmoy 24 Hour Race - 50km Split	5:19:31 h	8
30.10	50mi	4th Sri Chinmoy 24 Hour Race - 50mi Split	10:14:51 h	12
30.10	100km	4th Sri Chinmoy 24 Hour Race - 100km Split	12:47:48 h	12
28.08	12h	2nd Crocheron 12 Hour Run	114.791 km	15
10.07	60km	Prospect Park 60 km	5:06:11 h	6
1981
22.11	100km	Metropolitan 100 km	10:18:30 h	19
22.11	50mi	Metropolitan 100 km - 50mi Split	7:44:34 h	17
26.09	24h	2nd Sri Chinmoy 24 Hour Race	129.149 km	31
26.09	50km	2nd Sri Chinmoy 24 Hour Race - 50km Split	4:34:57 h	12
26.09	50mi	2nd Sri Chinmoy 24 Hour Race - 50mi Split	7:48:34 h	11
26.09	100km	2nd Sri Chinmoy 24 Hour Race - 100km Split	9:59:49 h	11
29.08	49mi	Laurel 50 Miler	7:18:02 h	17
01.08	100mi	DC Road Runners 100 Mile	23:31:36 h	9
1980
04.05	50mi	7th Lake Waramaug 50mi Ultra Marathon	8:05:59 h	65
1979
17.11	50mi	17th JFK 50 Mile	10:43:04 h	170

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	1/8/1981	DC Road Runners 100 Mile	160,93	×5
✓ 2	30/10/1982	4th Sri Chinmoy 24 Hour Race	131,72	×4
✓ 3	26/9/1981	2nd Sri Chinmoy 24 Hour Race	129,15	×4
✓ 4	28/8/1982	2nd Crocheron 12 Hour Run	114,79	×3
✓ 5	24/11/1984	Metro 100 km	100,00	×3
✓ 6	22/11/1981	Metropolitan 100 km	100,00	×3
✓ 7	4/5/1980	7th Lake Waramaug 50mi Ultra Marathon	80,47	×2
✓ 8	17/11/1979	17th JFK 50 Mile	80,47	×2
✓ 9	29/8/1981	Laurel 50 Miler	78,86	×2
✓ 10	10/7/1982	Prospect Park 60 km	60,00	×2
✓ 11	13/11/1982	Prospect Park 50 km	50,00	×1