Kvernafoss is a nice waterfall near Grundarfjörður in teh region Vesturland, Iceland.
Start of the trail lies just outside Grundarfjörður (east) when crossing the river Kverná. From here it is a 1 kilometer walk following the river Kverná.
There are multiple other waterfalls in the area. Grundarfoss (east of Kvernafoss) in the river Grundara is one of them.