Tosa d'Alp or La Tosa is a 2,587 metre high mountain in Baixa Cerdanya in the Spanish Pyrenees. The Coll de Pal is a mountain pass that separates its eastern part from the Puigllançada. This mountain forms a quadripoint where the Alp, Urús, Das and Bagà municipal limits meet. There is a triangulation station (282081001) at the summit.Part of its slopes are home to the ski resort of Masella which is part of Alp 2500.