Cherry Mountain Landslide, Jefferson - Once referred to as Pondicherry Mountain, this mountain consists of two peaks: Mount Martha, the highest peak, and Owl’s Head. Mount Martha is one of the mountains on the New Hampshire 52 With A View hiking list. And Owl's Head was the sight of a massive landslide in July 1885. Cherry Mountain is mostly known for the Cherry Mountain Slide (also referred to as the Stanley Slide and the Owl’s Head Slide). At 6:00 AM ...