Lizumer Sonnenspitze, Alpine summit in Tyrol, Austria

Lizumer Sonnenspitze is a mountain summit in the Tux Alps reaching 2,831 meters (9,288 feet) above sea level. The peak features steep rock faces and varied geological formations that characterize the surrounding landscape.

The mountain served as an observation point within a military training zone, which shaped visitor access for many decades. This military use influenced how mountaineering in the region developed.

The peak lies inside the Lizum Walchen military training area, so climbing can be banned at times; the Lizumer Hütte at 2,019 m east below the summit serves as the main base. The name Sonnenspitze refers to the sunny side of the ridge above the Navis valley.

Climbers can reach this summit from the Naviser Hütte or Junsbergalm as starting points. Both base locations provide established routes that remain accessible during winter months for experienced mountaineers.

The summit stands at the edge of the Tauern Window, where Penninic and possibly Helvetic nappes are exposed. The mountain is built mainly of radiolarite, with limestone marble and breccias also present. Geologists observe mountain fracturing in the summit area that they consider a hazard for the military camp and the Lizumer Hütte below to the east.