Ultrarunner runs 106K, climbs 10,000m in Double Canmore Quad Challenge

Andy Reed ran the challenge in the Canadian Rockies twice in one go to set the FKT for the route in 26 hours, 33 minutes and 24 seconds

Courtney Dauwalter sets off on 788K Colorado Trail FKT attempt

The American ultrarunner is busy tackling one of her biggest challenges yet

WATCH: Ultrarunner Jeanelle Hazlett’s double Everesting challenge

A new mini-documentary follows Hazlett’s attempt to cover twice the elevation of Mount Everest in one week