Viktoria Brown breaks Canadian 100-mile record

Brown ran 14:57:13 at the Desert Solstice Track Invitational

Camille Herron breaks course record at Javelina Jundred 100-miler

Arlen Glick of Ohio won the men’s race in 13:14:51

What it will take for Walmsley and Herron to break 100K world records

Many top ultrarunners will be at the Hoka Project Carbon X 2 event, but beating (or even coming close to) the 100K world records will be far from easy