Crap Masegn, Mountain summit in Graubünden, Switzerland.

Crap Masegn is a summit of the Glarus Alps in Graubünden, Switzerland, standing south of the Vorab. Its eastern face lies in Falera, its western face in Ruschein, with a narrow southern strip touching Ladir. The cable-car station bearing the same name stands one kilometre southeast of the peak, on the unnamed junction of the Crest da Tiarms and Crest la Siala ridges.

The summit lies on the boundary between Falera and the Ilanz/Glion fractions of Ruschein and Ladir, a division that long shaped grazing and municipal rights on its flanks. Its modern role came with the Flims-Laax-Falera ski area, marketed as LAAX in winter: a cable car station bearing the mountain's name stands one kilometre southeast of the peak, where the Crest da Tiarms and Crest la Siala ridges meet, and gondolas from Treis Palas and Fuorcla end there.

The name Crap Masegn is Romansh, and the mountain lies in the Romansh-speaking Surselva. The ski area Flims-Laax-Falera markets itself as LAAX in winter, when the cable car station on the ridge junction southeast of the summit is served by lifts from Crap Sogn Gion, Treis Palas and Fuorcla. In summer those lifts stand idle and the area is promoted under Flims.

Access to the summit requires hiking via established trails from nearby villages like Laax or Falera, with proper equipment recommended due to rapidly changing weather conditions and the T3-rated difficulty level.

The Crap Masegn cable car station does not stand on the summit: it lies a kilometre southeast, on an unnamed saddle where the Crest da Tiarms and Crest la Siala ridges meet. West of the peak runs the Vorableitung, described as Europe's highest-altitude overhead power line.