i don't see where it is even funny...is the humor supposed to be that they are mocking the runner for running in shorts in snow: or running with a fancy outfit on: or just plain running to be running?
my first reaction is to be resentful that some paper thinks this is acceptable.
I'm white and a runner (albeit treadmill, not outdoor) and found this funny. It's the running in the snow bit. I think the joke could have been handled more tactfully if it were framed in a general "Why torture yourself" way instead of pointing out the skin color.
Foxtrot did a comic like that and it was pretty funny.
Jason: "Why does Mom run, Dad?"
Dad: "To keep herself good-looking and healthy."
(Mom passes by, sweaty, wheezing, tired, frazzled hair, etc)
Jason: "No, really, why does Mom run?"