Courtney Olsen and Charlie Lawrence won the 2026 IAU 100k World Championships. Olsen finished in 7:10:31, overtaking Miho Nakata in the 17th lap. Lawrence took the lead before halfway and held it, finishing in 6:09:25.

The race, held in Ames, Spain, featured 20 laps of 5k. Olsen, a former 50-mile world record holder, won the women’s race. Lawrence, also a world record holder, won the men’s race, finishing two minutes short of his own American record. Read more racing coverage.

The event, the 33rd edition, attracted runners from 44 countries. The course alternated between road and bike paths, with temperatures ranging from 16 to 32 degrees Celsius. The race is considered one of the most competitive ultramarathons globally. Related: Americans Courtney Olsen and Charlie Lawrence Win 2026 IAU 100k World Championships.

This original Runner World brief is based on reporting from iRunFar. Visit the source for its complete reporting, context and any later corrections.