Hochblassen, Mountain summit in Bavaria, Germany.

Hochblassen is a 2,703 m mountain of Wetterstein limestone in the Wetterstein range, about 4.5 km east of the Zugspitze. Three ridges meet at its summit: the Höllentalgrat to the west, the Blassengrat to the east and a connecting ridge north to the Alpspitze. Its north face above the Grießkar drops about 500 m, while the south walls above the Reintal exceed 900 m. A sub-peak, the Signalgipfel, reaches 2,698 m.

Hermann von Barth and Peter Klaisl made the first ascent on 24 August 1871. The easiest route, from the Grießkarscharte over the connecting ridge to the Alpspitze, was first walked in 1881 and is now rated UIAA II in places. Older maps marked a via ferrata on the Höllentalgrat to the summit, but all its safety fittings have since been removed.

The name Hochblassen refers to the mountain's pale Wetterstein limestone; Blassen is linked to the rock's light colour. The peak is climbed mainly by mountaineers, and the easiest route runs from the Grießkarscharte over the connecting ridge to the Alpspitze, first walked in 1881 and rated UIAA II in places.

The easiest ascent runs from the Grießkarscharte (2,463 m) south over the connecting ridge from the Alpspitze, first walked in 1881 and rated UIAA II in places; the Blassengrat is UIAA III. From the Höllentalanger Hut (1,381 m) the route via the Grießkarscharte and north ridge takes just under nine hours. Old maps show a via ferrata on the Höllentalgrat, but all its safety cables have been removed.

A secondary summit called Signalgipfel sits nearby and is linked to the main peak by a continuous ridge extending toward the neighboring Alpspitze. This ridge connection allows climbers to traverse multiple peaks within a single expedition.