Ogulin-Plaški valley (Croatian: Ogulinsko-plaščanska udolina) is a valley in the mountainous part of central Croatia, named after the towns of Ogulin and Plaški. It is located at an elevation of 300 to 380 meters above sea level, surrounded by the Dinaric Alps, namely the mountains of Velika Kapela, Mala Kapela, , , , Hum, and Pištenik. Its total area is around 1,100 square kilometres (420 sq mi). The A1 motorway intersects the valley near Oštarije. The D42 road and the M604 railway pass through it longitudinally.