 | |
|---|---|
| Route information | |
| Length | 447 km (278 mi) |
| Major junctions | |
| North end | Lake Balaton (Hungary) |
| Marcali, Nagyatád, Barcs, Grubišno Polje, Daruvar, Pakrac, Gradiška, Banja Luka, Donji Vakuf, Travnik | |
| South end | Zenica |
| Location | |
| Countries | Hungary, Croatia, Bosnia and Herzegovina |
| Highway system | |
European route E 661 is a part of the inter-European road system. This Class B north–south route is 449 kilometres (279 mi) long and it connects Lake Balaton in Hungary via western Slavonia in Croatia with Bosanska Krajina and central Bosnia.