Mount Sonder, or Rwetyepme, its Aboriginal name, is the fourth highest mountain in the Northern Territory, Australia at 1380 metres above sea level. Mount Zeil is the highest at 1531 metres, 27 kilometres to the west. It is 130 km (81 mi) west of Alice Springs along the MacDonnell Ranges in the West MacDonnell National Park. It marks one end of the celebrated Larapinta trail, which extends 223 kilometres to Alice Springs. The shape of the mountain is a double peak, the relative heights of which are somewhat ambiguous from the summit, although easy to identify from the surrounding plains. The mountain can be seen for the western half of the Larapinta trail, up to Ormiston Pound, which obscures it from then on.