I grew up on a mini mountain range called the Watchung Mountains & hiked as a small child on other mini mountains near by. But the mountain I will count for this is Cadillac Mountain on Mt. Desert Island where the sun first touches the US. I vividly remember waking up in the early AM & hiking up to the top in the cold Maine air to see the sun rise. Afterwards, we came down hot enough from our hiking efforts to be able to swim in the icy cold waterfall on the island below.