On Saturday, April 24, 2021, Lithuania’s Aleksandr Sorokin set new world records with a time of 11:14:56 for the 100-mile world record (that’s 160.934 kilometers) and a distance of 105.825 miles/170.309 kilometers for the 12-hour world record, at the Centurion Running Track 100 Mile in England. Sorokin’s marks best the previous records of 11:19:18 for 100 miles and 104.88 miles/168.7928 kilometers for 12 hours, which were both set by Zach Bitter in 2019 at the Six Days in the Dome race in Wisconsin, USA. According to Centurion Running, the company that organized the elite-only event, Sorokin also broke the 150K world record (10:27:48) and the Lithuanian 50-mile best (5:32:01) on his way to the 12-hour finish.

Sorokin has a long history with road and track ultrarunning. His resume includes top finishes at the 2019 IAU 24-Hour World Championships, which he won with a total of 278K in 24 hours, and the 2017 Spartathlon ultra in Greece, where he completed the 246K course in a little over 22 hours. 

The race was a 15-person, elite-invite-only event which took place at the Julie Rose Stadium in Ashford, England. Entrants ran on a regular 400m track, and despite the race’s monotony and repetitiveness, Sorokin pushed through each lap for 12 straight hours. 

The Centurion Running race organization offered live timing, a video live stream, and social media updates across their platforms. According to the live timing, Sorokin split 3:25:38 for 50 kilometers (6:37 per mile/4:07 per kilometer overall pace), 5:32:01 for 50 miles (6:38 per mile/4:07 per kilometer overall pace), 6:54:25 for 100 kilometers (6:40 per mile/4:08 per kilometer overall pace) on his way to the 100-mile and 12-hour world records. His 100-mile overall pace was 6:45 minutes per mile (4:12 per kilometer) and his 12-hour overall pace was 6:48 minutes per mile (6:14 per kilometer). Sorokin’s results bettered Bitter’s 100-mile record of 11:19:13 and 12-hour record of 168K from 2019. 

All records set in Ashford are still unofficial, but the Centurion Running website notes that the course was certified by UK Athletics, so the times should all be ratified soon.