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Dean Karnazes

Distance runner

Dean Karnazes

Ultramarathon runner and author (Ultramarathon Man), ran 50 marathons in 50 days

Make Dean Karnazes your rival

7 sourced records. Each exercise has a top recorded mark and its evidence. Check the date, age, effort and method before you compare.

Dean Karnazes marathon

Dean Karnazes's recorded marathon is 3:00:30. Performance date: 2006-11-05. Age at the time: 44. This was a competition result. The source at usmarathoners.com gives this mark. Source type: news report. Confidence is medium.

Compare your marathon with Dean Karnazes

2006 New York City Marathon · Day 50 of Endurance 50 (50 marathons in 50 states in 50 days)

Source quote and limits
“His New York finish that year was 3:00:30.”

Dean Karnazes - USMarathoners athlete page

The page's result table also lists 3:00:30 at the New York City Marathon on Nov 5, 2006. TIME 100 (2007) says he completed it in three hours thirty seconds: https://content.time.com/time/specials/2007/time100walkup/article/0,28804,1611030_1610841_1609861,00.html . The same page lists slower New York finishes: 3:18:05 (2016), 3:45:37 (2017), 4:12:09 (2019). Found through a Gemini Deep Research report (batch of 2026-10-30).

  1. 2006

    • Marathon3:00:30

      CompetitionDay 50 of Endurance 50 (50 marathons in 50 states in 50 days)

      News report, usmarathoners.com2006-11-05 · age 44medium confidence

      Quote and details
      “His New York finish that year was 3:00:30.”

      Dean Karnazes - USMarathoners athlete page2006 New York City Marathon

Dean Karnazes Spartathlon (245.3 km, road)

Dean Karnazes's recorded Spartathlon (245.3 km, road) is 34:45:27. Performance date: 2014-09-26. Age at the time: 52. This was a competition result. The source at statistik.d-u-v.org gives this mark. Source type: official result.

Spartathlon 2014 · Age 52

Source quote and limits
“26.-27.09.2014 Spartathlon (GRE) 245.3km 34:45:27 h”

Karnazes, Konstantine Dean - DUV Ultra Marathon Statistics

Ultra results database of the German Ultramarathon Association (DUV). The database gives the race dates 26-27 September 2014; the start day is stored.

  1. 2014

    • Spartathlon (245.3 km, road)34:45:27

      CompetitionAge 52

      Official result, statistik.d-u-v.org2014-09-26 · age 52

      Quote and details
      “26.-27.09.2014 Spartathlon (GRE) 245.3km 34:45:27 h”

      Karnazes, Konstantine Dean - DUV Ultra Marathon StatisticsSpartathlon 2014

Dean Karnazes Leadville Trail 100 (100 miles, trail)

Dean Karnazes's recorded Leadville Trail 100 (100 miles, trail) is 23:24:29. Performance date: 2006-08-19. Age at the time: 43. This was a competition result. The source at statistik.d-u-v.org gives this mark. Source type: official result.

Leadville Trail 100 2006 · Age 43

Source quote and limits
“19.-20.08.2006 Leadville Trail 100 Mile (USA) 100mi 23:24:29 h”

Karnazes, Konstantine Dean - DUV Ultra Marathon Statistics

Ultra results database of the German Ultramarathon Association (DUV). The database gives the race dates 19-20 August 2006; the start day is stored.

  1. 2006

    • Leadville Trail 100 (100 miles, trail)23:24:29

      CompetitionAge 43

      Official result, statistik.d-u-v.org2006-08-19 · age 43

      Quote and details
      “19.-20.08.2006 Leadville Trail 100 Mile (USA) 100mi 23:24:29 h”

      Karnazes, Konstantine Dean - DUV Ultra Marathon StatisticsLeadville Trail 100 2006

Dean Karnazes 350-mile non-stop run (road, no sleep)

Dean Karnazes's recorded 350-mile non-stop run (road, no sleep) is 80:44:00. Performance date: 2005-10. Age at the time: 43. The recorded effort was a max or PR. The source at atrailrunnersblog.com gives this mark. Source type: interview.

Solo 350-mile run, Northern California (151 miles to Calistoga, then the 199-mile Relay course to Santa Cruz) · Solo fundraising run; one-off course

Source quote and limits
“drank nine gallons of liquid over the course of 80 hours and 44 minutes of running”

Dean Karnazes Talks About His 350 Mile Run (Interview) - A Trail Runner's Blog (2005-10-23)

Karnazes states the 80 hours 44 minutes in the interview; the post title and introduction give the 350 miles, run 'last weekend' before the 23 October 2005 post, so the month is stored. Time is stated to the minute. Wikipedia gives the same 350 miles in 80 hours and 44 minutes without sleep in 2005 (citing Runner's World). A one-off course: compare with care. Found through a Gemini Deep Research report (batch of 2026-10-30).

  1. 2005

    • 350-mile non-stop run (road, no sleep)80:44:00

      Max or PRSolo fundraising run; one-off course

      Said in an interview, atrailrunnersblog.com2005-10 · age 43

      Quote and details
      “drank nine gallons of liquid over the course of 80 hours and 44 minutes of running”

      Dean Karnazes Talks About His 350 Mile Run (Interview) - A Trail Runner's Blog (2005-10-23)Solo 350-mile run, Northern California (151 miles to Calistoga, then the 199-mile Relay course to Santa Cruz)

Dean Karnazes Badwater 135 ultramarathon (135 miles, road)

Dean Karnazes's recorded Badwater 135 ultramarathon (135 miles, road) is 27:22:48. Performance date: 2004-07-12. Age at the time: 41. This was a competition result. The source at statistik.d-u-v.org gives this mark. Source type: official result.

Badwater 135 ultramarathon 2004 · Age 41

Source quote and limits
“12.-14.07.2004 Badwater Ultramarathon (USA) 135mi 27:22:48 h”

Karnazes, Konstantine Dean - DUV Ultra Marathon Statistics

Ultra results database of the German Ultramarathon Association (DUV). The database gives the race dates 12-14 July 2004; the start day is stored. He won the 2004 race (overall place 1).

  1. 2004

    • Badwater 135 ultramarathon (135 miles, road)27:22:48

      CompetitionAge 41

      Official result, statistik.d-u-v.org2004-07-12 · age 41

      Quote and details
      “12.-14.07.2004 Badwater Ultramarathon (USA) 135mi 27:22:48 h”

      Karnazes, Konstantine Dean - DUV Ultra Marathon StatisticsBadwater 135 ultramarathon 2004

Dean Karnazes 24-hour treadmill run: 147.96 miles

The source records Dean Karnazes's 24-hour treadmill run: 147.96 miles. Performance date: 2004-04. Age at the time: 41. The recorded effort was a max or PR. The source at sportsoasis.blogspot.com gives this mark. Source type: news report. Confidence is low.

Kiehl's Treadathalon, New York (24-hour treadmill world record attempt) · Record attempt beside Christopher Bergland, who set the record (153.76 miles)

Source quote and limits
“while Karnazes stopped at 147.96 miles”

Treadmills: The Bane of Dean Karnazes' Existence - Sports Oasis (2007-06-22)

One secondhand blog report gives the exact distance. Wikipedia and Bleacher Report give 148 miles in 24 hours on a treadmill in 2004; the reference Wikipedia cites (archived TrekRun event blog) does not show his final distance. recordholders.org dates the end of the run to 30 April 2004, 8:05 am, at the Kiehl's store, 109 Third Avenue, New York. A later 2007 attempt ended at 131 miles. Found through a Gemini Deep Research report (batch of 2026-10-30).

  1. 2004

    • 24-hour treadmill run: 147.96 miles

      Max or PRRecord attempt beside Christopher Bergland, who set the record (153.76 miles)

      News report, sportsoasis.blogspot.com2004-04 · age 41low confidence

      Quote and details
      “while Karnazes stopped at 147.96 miles”

      Treadmills: The Bane of Dean Karnazes' Existence - Sports Oasis (2007-06-22)Kiehl's Treadathalon, New York (24-hour treadmill world record attempt)

Dean Karnazes Western States 100 (100 miles, trail)

Dean Karnazes's recorded Western States 100 (100 miles, trail) is 17:43:54. Performance date: 2003-06-28. Age at the time: 40. This was a competition result. The source at statistik.d-u-v.org gives this mark. Source type: official result.

Western States 100 2003 · Age 40

Source quote and limits
“28.-29.06.2003 Western States 100 Mile Endurance Run (USA) 100mi 17:43:54 h”

Karnazes, Konstantine Dean - DUV Ultra Marathon Statistics

Ultra results database of the German Ultramarathon Association (DUV). The database gives the race dates 28-29 June 2003; the start day is stored. His fastest of many Western States finishes in the database.

  1. 2003

    • Western States 100 (100 miles, trail)17:43:54

      CompetitionAge 40

      Official result, statistik.d-u-v.org2003-06-28 · age 40

      Quote and details
      “28.-29.06.2003 Western States 100 Mile Endurance Run (USA) 100mi 17:43:54 h”

      Karnazes, Konstantine Dean - DUV Ultra Marathon StatisticsWestern States 100 2003

Compare your marathonSubmit evidence for Dean Karnazes

Photo: Narsil at en.wikipedia, CC BY-SA 3.0, via Wikimedia Commons. Cropped.