Backyard ultra

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The backyard ultra is a form of ultramarathon race where competitors must consecutively run the distance of 6,706 meters (4.167 miles) in less than one hour. The race is over when only one runner remains to complete a lap. This runner is marked as the winner and only finisher, with all other runners receiving a "DNF" (Did Not Finish). There is no predetermined end length or time in a backyard ultra, and the race continues as long as multiple runners can complete the loop within an hour.


Long before the first Backyard Ultra, in 1910, Eugene Estoppey (1871 - 1943) ran one mile every hour, for 1000 hours.[1] The previous record was 615 miles.[2]

Backyard ultras are the invention of Gary "Lazarus Lake" Cantrell,[3] who is also one of the founders and race directors of the Barkley Marathons.

The original backyard ultra is Big Dog's Backyard Ultra, which is held on his property in Bell Buckle, Tennessee and is named after his dog.[4] Today, Big's is an invitational race where the top competitors participate based on wins in a bracket of the various American and international backyard ultras.[3]


Exactly one hour after a backyard ultra's first starting time, the competitors run 4.167 miles (6.706 km) with a one-hour window to finish. These laps are repeated hourly. The race is won when a single runner successfully completes a lap alone.[5] If no competitor manages one more lap than the others, then all athletes receive a DNF and there is no winner.

The distance the runners race each hour is set at miles or 6705.6 meters, which is then rounded up to 6706 meters. The total distance run by a competitor who completes 24 laps is exactly 100 miles. Backyard ultra races are usually held on a loop measuring 6706 meters, though in Sweden some have been held on a 400-meter track.[6]

Some specific rules
  • Each lap can be a round course, or an out-and-back course on the same path.
  • In order to remain in the competition, the runners must be in the starting box when the hourly bell sounds. The starting box must be large enough to fit all the runners of the first lap; its size will not be changed during the competition.
  • There will be a warning sound 3, 2 and 1 minutes before the bell.
  • Except for relieving themselves, the runners are not allowed to leave the course. Personal assistance is forbidden on the course, but allowed between the laps. Aids like trekking poles are forbidden. Non-competitors may not be on the course. There may be aid stations on the lap if they support all competitors.
  • Slower runners must allow faster runners to overtake them.[7]

Difficulties in running a Backyard Ultra[edit]

In contrast to usual ultramarathon races, untrained people can join a Backyard Ultra — and not drop out during the first handful of rounds, as the required pace is quite low: 14.4 minutes per mile, or 8.9 minutes per kilometer. Thus, the challenge is rather a mental one: No participant knows when the race will end, and the participant's ranking does not depend on him, but on whether his competitors are giving up.

As every runner has to start the next round at exactly the same time, a fast runner does not have an advantage over slower ones. While running too fast will burn the energy reserves, a slow speed will not allow enough rest before the next round. Thus, the main challenge lies in maintaining the running speed over dozens of hours, getting enough rest, and spending the resting time as efficiently as possible — with either a massage, a power nap, a restroom visit, or getting food and drinks. The most successful Backyard Ultra runners strive for a resting time of 14 to 18 minutes, forcing them to run 4.167 miles in 42 to 46 minutes.

According to Lazarus Lake, most runners do not drop out because of missing the per-round time limit, but because of their diminishing mental strength to carry on. When a runner displays pain or fatigue, it often motivates the other runners to carry on because they expect him or her to give up.

Given the peculiarities of this running format, Backyard Ultra runners usually prepare by running private Backyard Ultras alone, with shorter distances per hour (for example, one, two or three miles every hour), and by optimizing the rest periods.[8]


The longest distance recorded by a competitor in a backyard ultra event is 101 laps (677.26 km or 420.83 miles) achieved by Belgian runners Merijn Geerts and Ivo Steyaert during the 2022 Backyard Ultra World Team Championships in October at their team’s home course in Belgium.[9] The pair of Belgian runners did not continue to attempt a 102nd yard, so technically the race did not have a winner. The previous world record was already held by Geerts who ran 90 laps (603.504 km or 375.0 miles) at "The Race of the Champions - Backyard Masters" in Rettert in Germany in May 2022.[10] Peter Cromie holds the record for most 100+ mile finishes at 7 (4 at 100, 2 at 150 and 1 at 200).[11]

The longest distance recorded by a female competitor in a backyard ultra event is 68 laps by Courtney Dauwalter at Big's Backyard Ultra in October 2020. In May 2019, Katie Wright became the first woman to win a backyard ultra event running 201 kilometres (125 mi) in 30 hours during an event in New Zealand.[12] She beat 5 other women and 40 men to emerge victoriously. Then, Maggie Guterl went on to win the Big's Backyard Ultra covering more than 402 km in 60 loops.[13]


  1. ^ "FUNERAL TODAY FOR EUGENE ESTOPPEY, VETERAN ATHLETE". Coronado Eagle and Journal. 1943-07-15. Retrieved 2023-03-25.
  2. ^ Oakes, Joe (2020-06-09). "From the Archive: One Mile Per Hour Isn't So Difficult – or Is It?". Retrieved 2023-03-25.
  3. ^ a b "For Ukrainian Runners, a Brutal Race Made Sense When Little Else Did". The New York Times. 23 October 2022.
  4. ^ "Last person standing: The race with no finish line". BBC Sport. Retrieved 2022-10-04.
  5. ^ "Big Backyard Ultra - October 15, 2016". Retrieved 2017-07-11.
  6. ^ "Ultrafestival - Team Ultrasweden LK - Friidrott - IdrottOnline Klubb". Retrieved 2017-07-11.
  7. ^ "Backyard Ultra - Rules". Retrieved 2023-03-25.
  8. ^ Heins, Whitney (2022-11-17). "Big Dog's Backyard Ultras Complete Guide: The Format, Training, How To Survive One". Retrieved 2023-03-25.
  9. ^ Milne, Keeley (2022-10-19). "World Backyard Ultra Champs: Belgium sets new record with a mind-boggling 101 hours". Canadian Running Magazine. Retrieved 2022-12-08.
  10. ^ Brady, Sarah (2022-10-20). "Belgian Runners Merijin Geerts and Ivo Steyaert Break Backyard Ultra Record". iRunFar. Retrieved 2022-11-15.
  11. ^ "BYU Lists". Google Docs. Retrieved 2019-04-27.
  12. ^ "Running Doctor Scores World First For Women". Retrieved 2019-08-17.
  13. ^ "Maggie Guterl Is First Woman to Win Big's Backyard Ultra". Runner's World. 2019-10-23. Retrieved 2022-11-15.

External links and literature[edit]