Montaña Roja, Special Nature Reserve in Tenerife, Spain.

Montaña Roja is a 171-metre volcanic cone in the Special Nature Reserve of Montaña Roja, in Granadilla de Abona on southern Tenerife. The rounded hill rises from a flat, dry plain, its upper slopes muted reddish-brown and its lower slopes sandy grey and tan, with faint darker streaks running down from a slightly flattened summit. Around it lie 166 hectares of sandy ground and dunes, called médanos, with a shallow body of water in front.

Montaña Roja is a recent volcanic cone within the 166-hectare Montaña Roja Special Nature Reserve, created in 1994 in Granadilla de Abona. The cone and surrounding sand dunes, or médanos, form one of Tenerife's best examples of inorganic sand habitats with wetlands. The reserve protects over 136 plant species, some threatened, and coastal lagoons used by migratory shorebirds.

The reserve's name comes from the reddish colour of the volcanic cone, which contrasts with the pale sand of the surrounding dunes, called médanos locally. The protected area covers 166 hectares of the Granadilla de Abona municipality, and its beaches and shallow lagoons are used by waders such as the Kentish plover, which nests here in the province's last remaining breeding site.

The reserve is accessible via roads TF-1, TF-64, and TF-643 leading toward El Médano and Los Abrigos. Visiting early morning or late afternoon offers better lighting for observing the red rock formations and walking the area comfortably.

The reserve protects one of Tenerife's best examples of inorganic sand habitats, with wetlands and supralittoral lagoons. It is the last place in the province where the Kentish plover (Charadrius alexandrinus) still nests, having disappeared from the coasts of Los Cristianos and Las Américas. Endemic beetles of the genus Pimelia also live here.