Running News Daily

The world of ultrarunning witnessed an extraordinary chapter this week as both the men's and women's Backyard Ultra world records were shattered at the Biotropika Ultra Trail in Russia's Leningrad Region, in a display of endurance that pushed the limits of human resilience.

The men's race delivered an unforgettable battle, with Dmitry Klimov emerging as the last runner standing after an astonishing 123 consecutive hourly loops. Covering 824.8 kilometres (512.5 miles) over more than 123 hours, Klimov eclipsed the previous world record of 119 laps, set by Australia's Phil Gore almost exactly one year earlier.

What made the achievement even more remarkable was the incredible depth of the competition. Fellow Russians Ivan Zaborsky and Dmitry Sheremet also surpassed Gore's previous benchmark, completing 121 and 122 laps respectively before bowing out. With his rivals unable to continue, Klimov completed the decisive final lap alone, sealing a historic new world record.

The women's competition was equally inspiring. Vera Chekalina, 49, produced a remarkable performance by completing 96 laps, covering 643.2 kilometres (399.7 miles) to establish a new women's Backyard Ultra world record. Her achievement highlighted not only exceptional physical endurance but also the mental toughness required to excel in one of the sport's most demanding formats.

Unlike traditional ultramarathons, the Backyard Ultra follows a deceptively simple concept. Athletes must complete a 6.706-kilometre (4.167-mile) loop within one hour. At the start of every new hour, every remaining runner must begin another lap. There are no finish lines or predetermined distances—the race continues until only one competitor remains capable of completing another lap.

In this relentless format, raw speed offers little advantage. Success depends on meticulous pacing, effective recovery, disciplined nutrition, careful foot management, and the ability to resist the temptation to push too hard while watching competitors gradually drop out. Klimov, Sheremet, Zaborsky, and Chekalina demonstrated those qualities at the highest level, sustaining their efforts for more than five days.

The Biotropika Ultra Trail will now be remembered as one of the most significant events in Backyard Ultra history, producing two world records and redefining what is possible in one of endurance sport's most unforgiving disciplines. As the global ultrarunning community reflects on these remarkable performances, one thing is clear: the boundaries of human endurance have been pushed further than ever before.