Congost River
Congost river through la Garriga
Location
Country	Spain
Cities	Collsuspina, Centelles, la Garriga, Granollers, Montmeló
Physical characteristics
Source	Waters of the western cliffs of the Plain of Vic
• location	Collsuspina, Osona, Catalonia, Spain
• coordinates	41°49′38.21″N 2°11′42.72″E / 41.8272806°N 2.1952000°E / 41.8272806; 2.1952000
• elevation	3,307 ft (1,008 m)
Mouth	Besòs River
• location	Montmeló, Vallès Oriental, Catalonia, Spain
• coordinates	41°32′46.82″N 2°15′3.38″E / 41.5463389°N 2.2509389°E / 41.5463389; 2.2509389
• elevation	236 ft (72 m)
Length	25.47622 mi (41.00000 km)
Basin size	86.87 sq mi (225.0 km2)

The Congost (Catalan pronunciation: [kuŋˈgost]) is a river basin of the Besòs river and owes its name to the narrow gorge through which it passes, largely through the Catalan pre-coastal mountain range in Spain.

The Congost River is born of the waters of the western cliffs of the Plain of Vic, at the foot of Sant Cugat Gavadons in land consisting of sandstone and marl.

The river is in the gap that separates the massif of Montseny from the Cliffs of Bertí separating these two mountainous units north to south. Its action for centuries has achieved a major gorge that begins at Gorg Negre, near Centelles, and continues to Aiguafreda and Figueró to open on the plain of Vallès when it comes to la Garriga. After that it crosses the plains of Vallès, Granollers through, and finally forms Besòs at its confluence with the Mogent, at the height of Montmeló. No major tributaries, but many of them are also gorges.