13 Geography of the Province of Castellón

Alcalatén is a comarca in the province of Castellón, Valencian Community, Spain.

Alt Maestrat is a comarca in the province of Castellón, Valencian Community, Spain.

Alto Mijares is a comarca in the province of Castellón, Valencian Community, Spain. It is part of the Spanish-speaking area in the Valencian Community.

Alto Palancia is a comarca in the province of Castellón, Valencian Community (Spain). It is part of the Spanish-speaking area in the Valencian Community.

Baix Maestrat is a coastal comarca located in the north of the province of Castellón, Valencian Community, Spain. The capital of the comarca is Vinaròs.

The Bergantes is a short river in the Valencian and Aragon Communities which rises in the comarca of el Ports (Castellón), 12.5 kilometres (7.8 mi) SSE of Morella. It is the only river in Valencia which forms part of the Ebro basin.

The Maestrazgo or Maestrat is a natural and historical mountainous region, located at the eastern end of the Sistema Ibérico mountain range, in Spain. It encompasses the north of the Autonomous Community of Valencia, in Castellón province, and parts of the east of the Aragonese province of Teruel. The area is mountainous and sparsely populated with a rich mixture of flora and fauna.

Plana Alta is a comarca in the province of Castelló in the Valencian Country (Spain). The largest town in the comarca is Castelló de la Plana, which is also the capital and largest town in the province.

Plana Baixa is a comarca in the province of Castellón, Valencian Community, Spain.

Ports is a comarca in the province of Castellón, Valencian Community, Spain. It mostly overlaps the historical comarca known as Ports de Morella, except for the municipal areas surrounding Catí and Vilafranca that were excluded from the present-day Ports comarca.

Serra d'Espadà is a 51 km (32 mi) long mountain range in the Alt Palància, Alt Millars and Plana Baixa comarcas, in the Province of Castellón, Valencian Community, Spain. Its highest point is La Ràpita.

The Ojos Negros Greenway, is a 160-kilometre greenway in Spain running between the village of Santa Eulalia del Campo in the province of Teruel in Aragón and the village of Algimia d'Alfara, in the province of Valencia in the Valencian Community.