Ruta Mazelis
ID 114665
Born : 1959 Cat. W65 Ultrarunner since 1995 USA
36
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
41
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
2
Countries visited ?CANCanadaUSAUnited States
81,9%
Rank quotient ?This runner's calculation uses 36 eligible race(s): Σ(rank − 1) = 2 541; Σ finishers = 3 102. 2 541 / 3 102 × 100 = 81.91%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed37
Km — ultra races2 431 km
> 100 km2
> 160 km2
> 24h8
Longest race164,2 km
Children's Hospital 24 Hour Run — 5/10/1996

Km per year (ultra races)

2022
2023
56
1 race
2024
2025
50
1 race
2026

Race types (share of distance)

Road39,2%
Trail57,0%
Stage3,8%

Wins & podiums (ultra)

🏆 Win0
🏆 Win F2
🏅 Top 31
🏅 Top 3 F9
Longest winning streak0
Current streak0

Records

50 km4h56'2450 mi10h29'23100 mi29h16'3112 h53,11 km24 h164,15 km

HISTORY

36 race(s)
DateRacePerf.Rk
2026
02.05 24h USA14th O24 - Outrun 24h Trail Run 50.011 km52
2024
14.09 24h USA1st NEO24 56.103 km67
2016
17.09 24h USA10th North Coast 24 Hour Endurance Run 47.700 km170
2015
19.09 24h USA9th North Coast 24 Hour Endurance Run 45.097 km162
2014
20.09 24h USA8th North Coast 24 Hour Endurance Run 53.715 km146
2013
05.10 12h USAChildren's Hospital Benefit Run 53.108 km6
2011
17.09 24h USA3rd North Coast 24 Hour Endurance Run - Open race 53.639 km174
16.07 50km USA17th Buckeye Trail 50k 10:10:03 h150
2010
02.10 12h USAChildren's Hospital Benefit Run 45.061 km11
2009
19.04 50km USA1st Forget the PR - Mohican 50k 8:48:00 h123
2007
31.03 50mi USA13th Umstead Endurance Run 50 Miles 12:20:33 h73
2003
02.08 92km/2stages CANUltimat Canuck 92 km Stage Race 12:05:01 h31
10.05 50km USA22th Ice Age Trail 50 km Run 6:49:55 h78
05.04 50mi USA9th Umstead Endurance Run 50 Miles 12:41:59 h64
2002
07.09 50km CAN7th Haliburton Forest 50 km Race 7:23:26 h28
29.06 50km CAN10th Niagara Ultra 50 km 7:09:47 h57
06.04 50mi USA8th Umstead Endurance Run 50 Miles 13:55:27 h96
2001
01.09 50km CAN6th Haliburton Forest 50 km Race 7:20:39 h34
30.06 50km CAN9th Niagara Ultra 50 km 6:33:11 h36
2000
07.10 24h USAChildren's Hospital 24 Hour Run 82.076 km10
02.09 50mi CAN5th Haliburton Forest 50 Mile Race 13:53:25 h21
12.08 8h USA10th Howl at the Moon 8h Run 56.825 km61
08.04 50mi USA6th Umstead Endurance Run 50 Miles 14:38:37 h87
1999
04.12 50km USA10th Sunmart Texas Trails 50 km 6:58:59 h430
14.08 8h USA9th Howl at the Moon 8h Run 66.015 km51
31.07 50km USA6th Buckeye Trail 50k 8:04:57 h24
10.04 50mi USA5th Umstead Endurance Run 50 Miles 12:58:24 h80
1998
05.09 100mi CAN3rd Haliburton Forest 100 Mile Race 29:16:31 h19
27.06 50mi CAN6th Niagara Ultra 50 Mile 10:29:23 h11
23.05 50km CAN6th Sulphur Springs Trail Run 50km 6:12:43 h44
04.04 50km CAN3rd Ascension 50 km Run 4:56:24 h18
1997
30.08 50mi CAN2nd Haliburton Forest 50 Mile Race 10:33:17 h14
24.05 50km CAN5th Sulphur Springs Trail Run 50km 6:33:33 h53
1996
05.10 24h USAChildren's Hospital 24 Hour Run 164.153 km2 🥈
31.08 50mi USA13th Groundhog Classic 50 Mile 11:30:00 h47
1995
02.09 50mi USA12th Groundhog Classic 50 Mile 11:31:33 h47