>>360138Convince him to do it by giving him goals outside of simply walking, but which require walking to achieve.
Organize camping trips out in the sticks, invite friends, bring alcohol, have a party out there, hiking to and from of course.
Anything like that you can get him hiking without him realizing that's what he's there for.
Eventually he might find things to enjoy about the hiking itself all on his own. Don't force it.
Alternately, dump him and give me a call, I'm planning a walk from Victoria BC to the East coast of Canada. I don't hope to find a girl cool enough to join me... but you never know!