Otsamunho, Mountain summit in Lower Navarre, France

Otsamunho is a mountain in Lower Navarre with a summit reaching 901 meters, surrounded by natural vegetation on its slopes. Multiple walking routes approach the peak from different starting points across the region.

Otsamunho lies on the border between Aldude and Banka, in the Pyrenees of Lower Navarre. The summit gives its name to the Otsamunho range, whose highest point is Errola at 907 m; the Basque Mountaineering Federation catalogue lists Otsamunho but not Errola. Routes reach it from Aldude via the Mizpira pass and from Banka via the Marmaro pass.

The name Otsamunho is Basque, and the summit gives its name to the whole Otsamunho ridge, which also includes Errola (907 m). The Basque Mountaineering Federation's catalogue lists Otsamunho but not Errola, so the lower summit is the one officially recognised. Walkers also pass Basque-named spots such as the Mizpira and Meharoztegi passes.

The eastern route offers the most gradual climb and works best for less experienced walkers. Wear sturdy footwear and be prepared for changing weather conditions at higher elevations.

The summit lies exactly on the border between Aldude and Banka, so the ridge line itself separates the two communes. The Otsamunho range is named after this peak, yet the range's highest point is Errola at 907 m; the Basque Mountaineering Federation lists Otsamunho in its catalogue but not Errola.