Slovenia, Primorska
Beside the most improbably turquoise river in Europe, bend after flowing bend.
Length
43 km
In miles
26.7 mi
Driving time
1 hr 5 min
Atlas rating
9.0 / 10
The run
Bovec to Tolmin, following the Route 203. Drive it in either direction, though the views usually favour the climb.
Season
Rockfall after heavy rain
Checked by the Drivers Atlas desk
Scored and written by the Drivers Atlas editorial desk, drawing on driven routes across the UK and Europe, mapping data and member road reports. Every road in the library carries a driving and scenery score set by the same method. How we score roads.
Last reviewed 17 March 2026
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