What is Mt. Deception?

Things are not what they seem on Mt. Deception, New Hampshire, where Hadley and Rebecca set up camp to share one night together. The couple knows that they will be found and separated so they prolong their time together by climbing the mountain before nightfall. This mountain rises up behind the Slegg home. This is the site where misunderstandings culminate into tense arguments between Hadley and Rebecca, Hadley and Sam, Hadley and Oliver, and Rebecca and Oliver. This is where Hadley falls to his death.