Following the Una — From Bihać to Bosanska Krupa

Enter Una National Park with time to spare

South of Bihać, Una National Park protects the finest stretch of the river: a sequence of travertine waterfalls, emerald pools and clear rapids cutting through a forested canyon toward the Croatian border. The Romans are said to have called the river Una — “the one” — because no other river compared, and the park is built around the water.

The headline sight is Štrbački Buk, a broad travertine cascade you can stand beside, and the park holds further waterfalls and rapids along the Una and its tributaries. The park is the country’s great river park — a place where the headline experience is getting onto the water itself, and where the walking, the swimming and the viewing all follow from the river.

The park deserves more than a flying visit. Enter with time to spare, plan the stops along the river, and treat the waterfalls as the spine of the day rather than a single photo stop.

Treat rafting and kayaking as planned activities

The Una is a powerful river, and rafting and kayaking are the experiences most visitors remember — but they are planned activities, not spontaneous ones. The rapids that make the river famous also make it dangerous for the unprepared, and the park’s water levels change with the season and the weather.

Treat both sports as things to arrange in advance with knowledgeable local providers, to brief for properly, and to undertake with the right equipment. The river is the reason the park exists, and the way to enjoy it is the way to respect it: planned, guided, and within the conditions of the day.

Swimming is possible where the river is calm enough, and the walking trails and viewpoints carry the visit when the water is not an option. The river sets the pace; the visit follows it.

Finish among the islands of Bosanska Krupa

Downstream of Bihać and outside the national park, Bosanska Krupa is a small river town where the Una widens and breaks around green islands joined by wooden footbridges, beneath the ruined medieval fortress of Pset on the hill above. It has the character of a quiet water crossroads — a place shaped less by grand events than by the river itself.

The day here is spent walking the fortress hill, crossing the bridges to the islands, resting by the water and, in the warm months, swimming where the river is calm enough. The reconstructed mills and the nearby spring of Vrelo Krušnice carry the river-town character further, and Bosanska Otoka downstream — where a mosque stands on its own river island — extends the same logic of the Una.

Bosanska Krupa is the most relaxed stop on the Una, and the natural end to a journey that begins in Bihać and runs through the park. Finish among the islands, and the river has made its case.

Build a flexible three-part journey

The Una reads best as a flexible three-part journey — the river town, the protected park, and the quiet water crossroads downstream — with the river as the thread that joins them. Build the days around the water, and let the conditions of the river set the pace.

• Bihać first — orient to the river in the town before heading into the park.
• The park as the core — give Štrbački Buk and the waterfalls a full day rather than a quick stop.
• River activities planned — arrange rafting and kayaking in advance with knowledgeable local providers and the right equipment.
• Bosanska Krupa to close — the islands and the fortress are the relaxed end to the route.
• Check conditions — water levels and access change with the season; confirm before river activities.