Maasheybash (Russian: Маашейбаш) is a mountain in the Altai Republic, Russia.

[1] The Saylyugemsky National Park is a protected area located about 15 kilometres (9.3 mi) to the west of the mountain in a straight line.

[5] Located in the area of Kosh-Agachsky District, it is one of the highest peaks of the Altai Mountains.

[3] The southern face has a steep cliff and on the western side the mountain gradually drops down to a height of 3,600 metres (11,800 ft).

Its geological composition is lava and tuff, as well as argillaceous and siliceous shale.