Nathan Kurtz
ID 257247
Born : 1982 Cat. M40 Ultrarunner since 2007 USA
25
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
32
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
1
Countries visited ?USAUnited States
51,1%
Rank quotient ?This runner's calculation uses 25 eligible race(s): Σ(rank − 1) = 1 271; Σ finishers = 2 487. 1 271 / 2 487 × 100 = 51.11%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed25
Km — ultra races1 539 km
> 24h4
Longest race87,2 km
5th Andy’s Backyard Ultra — 25/10/2025

Km per year (ultra races)

107
2 races
2022
2023
130
2 races
2024
137
2 races
2025
50
1 race
2026

Race types (share of distance)

Trail80,4%
Elim.19,6%

Records

50 km6h16'0250 mi10h28'2824 h60,35 kmBackyard13 loops

HISTORY

25 race(s)
DateRacePerf.Rk
2026
14.03 50km USA1st Blazing Saddles 7:35:32 h27
2025
25.10 Backyard Ultra USA5th Andy’s Backyard Ultra 87.178 km (13h)40
04.01 50km USA14th Mid-Maryland Ultra 50k 6:22:59 h41
2024
12.10 Backyard Ultra USA4th Andy’s Backyard Ultra 80.472 km (12h)11
06.01 50km USA13th Mid-Maryland Ultra 50k 6:32:46 h56
2022
15.10 Backyard Ultra USA2nd Andy’s Backyard Ultra 53.648 km (8h)36
05.02 8h USA17th 8 Hour Adventure Trail Run - ICY 52.947 km21
2021
16.10 Backyard Ultra USA1st Andy’s Backyard Ultra 80.472 km (12h)19
25.09 40mi USA14th Trails 4 Tails 40 Mile Run 8:57:00 h5
06.02 8h USA16th 8 Hour Adventure Trail Run - ICY 59.062 km24
2019
02.02 8h USA14th 8 Hour Adventure Trail Run 53.752 km39
2017
23.09 40mi USA10th Trails 4 Tails 40 Mile Run 8:59:00 h13
04.02 8h USA12th 8 Hour Adventure Trail Run 56.005 km19
2016
24.09 40mi USA9th Trails 4 Tails 40 Mile Run 8:52:00 h10
06.02 8h USA11th 8 Hour Adventure Trail Run 53.752 km33
2015
24.10 50km USA2nd Patapsco Valley 50K 7:14:49 h133
07.02 8h USA10th 8 Hour Adventure Trail Run 61.316 km20
2014
20.09 40mi USA7th Trails 4 Tails 40 Mile Run 9:13:00 h14
03.05 24h USA9th 24 Hour Adventure Trail Run 60.350 km63
2013
21.09 40mi USA6th Trails 4 Tails 40 Mile Run 9:12:00 h10
02.02 8h USA8th 8 Hour Adventure Trail Run 59.062 km23
2012
22.09 40mi USA5th Trails 4 Tails 40 Mile Run 9:03:00 h10
19.05 50km USA14th Capon Valley 50K Run 6:16:02 h89
2011
24.09 40mi USA4th Trails 4 Tails 40 Mile Run 8:39:00 h10
2007
17.11 50mi USA45th JFK 50 Mile 10:28:28 h530