Tossa del Pas dels Lladres, Mountain summit in Eastern Pyrenees, Spain and France.

Tossa del Pas dels Lladres is a 2,661-metre mountain summit where the municipal terms of Queralbs (Ripollès) and the communes of Er and Vallcebollera (Alta Cerdanya) meet. Its bare upper mass is pale brown and tan, with a rounded crest that rises slightly higher on the right and snow lingering in shallow gullies and a shadowed central hollow.

The summit lies at the meeting point of three municipalities: Queralbs in the Ripollès comarca and the communes of Er and Vallcebollera in Alta Cerdanya. The name Pas dels Lladres, 'pass of thieves', refers to the neighbouring pass to the north-west, not to a documented medieval border role. The peak is a reference point for hiking routes from both Alta Cerdanya and the Ripollès, especially those linked to the Vall de Núria.

The name comes from the Pas dels Lladres, the pass just to the north-west of the summit, which separates it from the Puig de Dòrria. "Lladres" means thieves in Catalan, and the toponym is the only trace left of that reputation. The summit is one of the reference peaks for hiking routes in this part of the Pyrenees, from Alta Cerdanya in the north and from the Ripollès in the south, especially those linked to the Vall de Núria.

The summit can be reached via established hiking routes from three different locations: Err and Valcebollère on the French side, and Queralbs on the Spanish side. Be aware that weather conditions and terrain difficulty can vary significantly with the season, so proper preparation is important.

The name comes from the Pas dels Lladres, the "pass of thieves", a crossing immediately to the mountain's northwest. The peak is one of the reference summits for most hiking routes in this Pyrenean sector, approached from both Alta Cerdanya and the Ripollès, especially routes linked to the Vall de Núria.