It's a black bear. They don't get nearly as big as grizzlies. In other words, I don't think that's a cub... juvenile maybe, but definitely not the age that it's still being protected by its mother.
I'm not sure that's guaranteed, TheOtherCapnS. I did a little poking around/life wasting, and that one *might* be young enough to still be with its mother. They can hit 60-70 pounds and still be with her.