Bob Mason

Born : 1920 Cat. M95 Ultrarunner since 1977

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

81,0%

Rank quotient ?This runner's calculation uses 8 eligible race(s): Σ(rank − 1) = 383; Σ finishers = 473. 383 / 473 × 100 = 80.97%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed8

Km — ultra races613 km

Longest race80,5 km

12th Lake Waramaug 50mi Ultra Marathon — 28/4/1985

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road100,0%

Records

50 km5h39'23 50 mi8h01'27

HISTORY

8 race(s)

Date		Race	Perf.	Rk
1987
12.12	50km	6th Tallahassee Ultra Distance Classic 50K	5:39:23 h	27
1985
28.04	50mi	12th Lake Waramaug 50mi Ultra Marathon	9:24:54 h	45
1984
29.04	50mi	11th Lake Waramaug 50mi Ultra Marathon	9:47:24 h	58
1981
03.05	50mi	8th Lake Waramaug 50mi Ultra Marathon	9:05:00 h	71
1980
05.10	50mi	2nd AMJA 50 Mile Ultramarathon	9:12:35 h	63
1979
23.09	50mi	Michigan 50 miles	9:08:28 h	40
06.05	50mi	6th Lake Waramaug 50mi Ultra Marathon	8:14:55 h	73
1977
18.09	50mi	Michigan 50-mile road race	8:01:27 h	14

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	28/4/1985	12th Lake Waramaug 50mi Ultra Marathon	80,47	×3
✓ 2	29/4/1984	11th Lake Waramaug 50mi Ultra Marathon	80,47	×3
✓ 3	3/5/1981	8th Lake Waramaug 50mi Ultra Marathon	80,47	×3
✓ 4	5/10/1980	2nd AMJA 50 Mile Ultramarathon	80,47	×3
✓ 5	23/9/1979	Michigan 50 miles	80,47	×3
✓ 6	6/5/1979	6th Lake Waramaug 50mi Ultra Marathon	80,47	×3
✓ 7	18/9/1977	Michigan 50-mile road race	80,47	×3
✓ 8	12/12/1987	6th Tallahassee Ultra Distance Classic 50K	50,00	×2