Maze tracks Ben Rivers thought the woods and finds him being held at gunpoint by Joan and her goons in episode 3x03 "Mr. & Mrs. Mazikeen Smith".
Source: kingscourtgraph — Twitter, 2
Oliver climbs up a mountain to fight a duel with Ra's al Ghul in episode 3x09 "The Climb". From episode 3x10 "Left Behind".
From episode 2x06 "Ascension".
Source: XF Marks the Spot
From episode 5x04 "Cease Fire".
From episode 2x09 "Vancouver".