The Asco (French pronunciation: [asko]; Corsican: Ascu) is a small river in the department of Haute-Corse, Corsica, France.

The river rises in the Monte Cinto massif among some of the highest mountains of Corsica, passes a ski resort and the old village of Asco and cuts through a dramatic 4 kilometres (2.5 mi) gorge before joining the Golo.

[2] The Asco flows northwest, then north past the Haut-Asco resort, then runs northeast to the village of Asco, east-northeast to the south of the village of Molifao, then east to a point just north of Ponte Leccia, where it joins the Golo.

The gorge draws many tourists in the summer months, attracted by its rugged topography and wild animals.

The village has a war memorial and the parish church of Archangel Saint Michael, with stone walls and a bell tower.

[4] The nearby Genoese bridge was built in the 15th century when Corsica was occupied by the Republic of Genoa.

It is below Asco village at an altitude of 535 metres (1,755 ft) on a winding secondary road that ends at the bridge.

It is a 180 kilometres (110 mi) trail that crosses the high mountain range of Corsica.