My favorite hike is doing the entire Skyline Trail in the Blue Hills. It is climbing a New Hampshire White Mountain 4000-footer right in my own backyard. It is 9 miles. It takes all day. It has rugged rocky terrain. It has the accumulated elevation. But instead of up-down like in the Whites, it is up-down-up-down-up-down-etc. All the workout of a mountain right here at home in my own Blue Hills! Doesn't get any better than that!