In a radius of 15 to 30 km, the town is surrounded by the Gardunha mountain range (in the north) and by the Alvelos and Moradal mountain ranges (west to south), while the Serra da Estrela (the highest mountain range in Portugal), is located 50 km to the north of Alcains. Other mountain ranges, such as Serra da Lousã, Serra do Açor and Serra de São Mamede are also visible from Alcains. The Sierra de Gata is also located along the Portuguese-Spanish border and can also be seen in the horizon.