Mount Sonder, or Rwetyepme, its aboriginal name, is the second highest mountain in the Northern Territory, Australia at 1380 metres above sea level. Mount Zeil is the highest at 1580 metres, just 27 kilometres to the west. It is located 130 kilometres west of Alice Springs along the West MacDonnell Range in the MacDonnell National Park. It marks one end of the celebrated Larapinta trail, which travels 250 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 ground. The mountain can be seen for the western half of the Larapinta trail, up to Ormiston Pound, which obscures it from then on.
A clearly defined walking track exists up the western side, taking about 12 kilometres. Water is available at the base, and a direction plate can be found at the summit. The view from the top boasts the taller Mount Zeil to the west, the West MacDonnell Mountain range to the east, Glen Helen gorge, a very small town, to the east and Gosses Bluff to the south west on a clear day. [[