John Zanderzuk

Born : 1938 Cat. M85 Ultrarunner since 1981

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

67,2%

Rank quotient ?This runner's calculation uses 16 eligible race(s): Σ(rank − 1) = 315; Σ finishers = 469. 315 / 469 × 100 = 67.16%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed16

Km — ultra races1 453 km

> 100 km7

> 24h4

Longest race127,1 km

6th Sri Chinmoy 24 Hour Race — 7/11/1984

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Road96,0%

Trail4,0%

Wins & podiums (ultra)

🏆 Win0

🏆 Win M0

🏅 Top 31

🏅 Top 3 M1

Longest winning streak0

Current streak0

Records

50 km4h39'12 100 km9h42'50 50 mi7h43'33 12 h119,94 km 24 h127,14 km

HISTORY

16 race(s) · 8 split(s) nested

Date		Race	Perf.	Rk
1987
02.05	24h	9th Sri Chinmoy 24 Hour Race	85.295 km	38
02.05	50mi	9th Sri Chinmoy 24 Hour Race - 50mi Split	10:13:27 h	31
1984
24.11	100km	Metro 100 km	9:42:50 h	8
07.11	24h	6th Sri Chinmoy 24 Hour Race	127.138 km	38
07.11	50mi	6th Sri Chinmoy 24 Hour Race - 50mi Split	9:01:40 h	28
07.11	100km	6th Sri Chinmoy 24 Hour Race - 100km Split	11:26:41 h	24
18.08	12h	3rd Crocheron 12 Hour Run	112.924 km	10
24.03	12h	Prospect Park 12 Hour Run	119.941 km	3 🥉
1983
03.12	50mi	Valley Stream 50 Miler	7:43:33 h	28
06.11	70mi	3rd Sri Chinmoy 70 Mile Run	11:34:08 h	8
06.11	50mi	3rd Sri Chinmoy 70 Mile Run - 50mi Split	8:06:56 h	10
06.11	100km	3rd Sri Chinmoy 70 Mile Run - 100km Split	10:17:49 h	10
24.09	24h	5th Sri Chinmoy 24 Hour Race	112.996 km	45
24.09	50km	5th Sri Chinmoy 24 Hour Race - 50km Split	4:58:16 h	16
24.09	50mi	5th Sri Chinmoy 24 Hour Race - 50mi Split	8:31:13 h	18
24.09	100km	5th Sri Chinmoy 24 Hour Race - 100km Split	10:44:41 h	16
23.07	24h	Essex County 24 Hour	57.936 km	14
22.05	50mi	13th Metropolitan 50 Mile Race	7:50:42 h	33
1982
13.11	50km	Prospect Park 50 km	4:39:12 h	8
07.11	70mi	2nd Sri Chinmoy 70 Mile Run	12:18:58 h	6
18.09	36mi	North Poconos Two Bridges 36 Mile	5:25:06 h	16
28.08	12h	2nd Crocheron 12 Hour Run	102.545 km	25
31.07	60km	Broadway Ultra Society Handicap Ultra	6:06:33 h	14
1981
20.12	50mi	Valley Stream 50 Miler	8:20:42 h	37

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	7/11/1984	6th Sri Chinmoy 24 Hour Race	127,14	×3
✓ 2	24/3/1984	Prospect Park 12 Hour Run	119,94	×3
✓ 3	24/9/1983	5th Sri Chinmoy 24 Hour Race	113,00	×3
✓ 4	18/8/1984	3rd Crocheron 12 Hour Run	112,92	×3
✓ 5	6/11/1983	3rd Sri Chinmoy 70 Mile Run	112,65	×3
✓ 6	7/11/1982	2nd Sri Chinmoy 70 Mile Run	112,65	×3
✓ 7	28/8/1982	2nd Crocheron 12 Hour Run	102,55	×3
✓ 8	24/11/1984	Metro 100 km	100,00	×2
✓ 9	2/5/1987	9th Sri Chinmoy 24 Hour Race	85,30	×2
✓ 10	3/12/1983	Valley Stream 50 Miler	80,47	×2
✓ 11	22/5/1983	13th Metropolitan 50 Mile Race	80,47	×2
✓ 12	20/12/1981	Valley Stream 50 Miler	80,47	×2
✓ 13	31/7/1982	Broadway Ultra Society Handicap Ultra	60,00	×1
✓ 14	18/9/1982	North Poconos Two Bridges 36 Mile	57,94	×1
✓ 15	23/7/1983	Essex County 24 Hour	57,94	×1
✓ 16	13/11/1982	Prospect Park 50 km	50,00	×1