Mike Doolittle

Born : 1939 Cat. M85 Ultrarunner since 1982

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

49,9%

Rank quotient ?This runner's calculation uses 20 eligible race(s): Σ(rank − 1) = 1 182; Σ finishers = 2 367. 1 182 / 2 367 × 100 = 49.94%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed20

Km — ultra races1 932 km

> 100 km6

> 160 km5

> 24h2

Longest race188,7 km

3rd Redwood Empire 24 Hour Run — 22/3/1986

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road34,2%

Trail65,8%

Records

50 km4h51'08 50 mi7h55'25 100 mi28h28'34 24 h188,74 km

HISTORY

20 race(s) · 6 split(s) nested

Date		Race	Perf.	Rk
1990
07.09	100mi	11th Wasatch Front 100 Mile	32:39:19 h	35
1989
19.08	100mi	7th Leadville Trail 100 Mile	28:35:34 h	94
1988
10.04	50mi	9th American River 50 Mile Endurance Run	10:54:32 h	175
1987
27.11	28mi	3rd Quad Dipsea Trail Run	6:27:50 h	54
27.06	100mi	14th Western States 100 Mile Endurance Run	28:28:34 h	137
09.05	50mi	4th Quicksilver 50 Mile Endurance Run	10:24:29 h	35
12.04	50mi	8th American River 50 Mile Endurance Run	9:05:11 h	155
07.02	50mi	9th Jed Smith Ultra Classic - 50 Mile Race	8:25:16 h	10
18.01	50mi	1st Ledson Marsh 50 Mile	8:23:10 h	14
1986
29.11	28mi	2nd Quad Dipsea Trail Run	5:53:25 h	36
22.03	24h	3rd Redwood Empire 24 Hour Run	188.735 km	6
22.03	50mi	3rd Redwood Empire 24 Hour Run - 50mi Split	8:46:24 h	13
22.03	100km	3rd Redwood Empire 24 Hour Run - 100km Split	11:14:01 h	6
22.03	100mi	3rd Redwood Empire 24 Hour Run - 100mi Split	19:38:28 h	7
1985
30.11	28mi	1st Quad Dipsea Trail Run	5:47:30 h	40
04.08	50km	4th Skyline 50k Endurance Run	5:24:29 h	124
16.03	24h	2nd Redwood Empire 24 Hour Run	166.567 km	12
16.03	50mi	2nd Redwood Empire 24 Hour Run - 50mi Split	8:49:52 h	12
16.03	100km	2nd Redwood Empire 24 Hour Run - 100km Split	11:26:32 h	11
16.03	100mi	2nd Redwood Empire 24 Hour Run - 100mi Split	20:44:33 h	8
1984
23.06	93.5mi	11th Western States 100 Mile Endurance Run	22:50:00 h	91
13.05	50mi	California 50 Mile Endurance Run	8:33:43 h	30
11.02	50mi	6th Jed Smith Ultra Classic - 50 Mile Race	8:04:13 h	39
1983
23.10	50mi	Far Western 50 Mile	7:55:25 h	7
1982
11.12	40mi	Arcata to Willow Creek Run	5:33:18 h	9
01.08	50km	1st Skyline 50k Endurance Run	4:51:08 h	99

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	22/3/1986	3rd Redwood Empire 24 Hour Run	188,74	×4
✓ 2	16/3/1985	2nd Redwood Empire 24 Hour Run	166,57	×4
✓ 3	7/9/1990	11th Wasatch Front 100 Mile	160,93	×4
✓ 4	19/8/1989	7th Leadville Trail 100 Mile	160,93	×4
✓ 5	27/6/1987	14th Western States 100 Mile Endurance Run	160,93	×4
✓ 6	23/6/1984	11th Western States 100 Mile Endurance Run	150,47	×3
✓ 7	10/4/1988	9th American River 50 Mile Endurance Run	80,47	×2
✓ 8	9/5/1987	4th Quicksilver 50 Mile Endurance Run	80,47	×2
✓ 9	12/4/1987	8th American River 50 Mile Endurance Run	80,47	×2
✓ 10	7/2/1987	9th Jed Smith Ultra Classic - 50 Mile Race	80,47	×2
✓ 11	18/1/1987	1st Ledson Marsh 50 Mile	80,47	×2
✓ 12	13/5/1984	California 50 Mile Endurance Run	80,47	×2
✓ 13	11/2/1984	6th Jed Smith Ultra Classic - 50 Mile Race	80,47	×2
✓ 14	23/10/1983	Far Western 50 Mile	80,47	×2
✓ 15	11/12/1982	Arcata to Willow Creek Run	64,37	×1
✓ 16	4/8/1985	4th Skyline 50k Endurance Run	50,00	×1
✓ 17	1/8/1982	1st Skyline 50k Endurance Run	50,00	×1
✓ 18	27/11/1987	3rd Quad Dipsea Trail Run	45,06	×1
✓ 19	29/11/1986	2nd Quad Dipsea Trail Run	45,06	×1
✓ 20	30/11/1985	1st Quad Dipsea Trail Run	45,06	×1