Summer arrives and our thoughts turn to hiking in the mountains. Until now, the weather, by and large, has been decent for hiking in the piedmont. Come Memorial Day, however, the steamy reality of summer settles in; for many, the prospect of a 90/90 (heat/humidity) day moves hiking to the bottom of their recreational to-do list. Or makes them re-think their options. So we turn to the mountains, which offer two forms of relief.