River Raša: the valley, tributaries and Raša Bay

Updated October 16, 2026.

The Raša links inland eastern Istria with a deep sea inlet. Along its course, steep valley sides give way to farmland and brackish water at the mouth.

From Potpićan through limestone country

The main course of the Raša is 23 kilometres long. It takes this name at Potpićan, where streams from the branching upper catchment meet. The wider headwater area includes the slopes of Učka and Ćićarija.

Downstream, the river runs through Raška draga, a deep valley cut into limestone. Water in karst landscapes often drains underground, but here thick river deposits on the valley floor allow it to flow above ground. Karst springs beside the river also feed its flow.

Farmland and a drowned valley

Agricultural land occupies the flat floor of the lower valley. Drainage and land reclamation turned part of the former marshland into fields, while reed beds and other wet habitats remain beside the water.

At the mouth, fresh water meets the sea, and the tides also affect the lower river. Raša Bay is about 12 kilometres long. After the last ice age, the sea flooded the lower part of the old river valley, leaving a sea inlet between steep slopes.

The river, the mining town and the waterfalls

The mining town of Raša lies in a side valley beside the Krapanski stream. This tributary joins the Raša downstream of Raški most, the bridge across the river. The town and the main river are separate destinations, despite sharing a name and belonging to the same valley system.

The upper catchment includes Sopot near Floričići, Benkovski waterfall near Most Pićan and Gologorički waterfall near Lukačići. These are separate sites on tributaries, away from the Raša’s main channel.