According to TMZ the former "Dancing With The Stars" finalist wore black athletic gear during his hike aiming for a "slimming" look.
In addition to his weight loss struggles, Kardashian is currently dealing with a legal battle with a photographer who claims he stole camera equipment from her after she tried to take shirtless pictures of him.
Kardashian pleaded not guilty to the two misdemeanor counts.
Rosie O'Donnell unveils nearly 50-pound weight loss
Putin thinks Obama would save him if he were drowning