The highway is about 205 kilometres (127 mi) long.

[1] Highway 42 passes by the communities of Marquis, Keeler, Brownlee, Eyebrow, Central Butte,[2] Lawson, Riverhurst, Lucky Lake, and Dinsmore, Saskatchewan.

It crosses Lake Diefenbaker on the 1.5-kilometre (0.93 mi) long Riverhurst Ferry route.

That crossing is an ice road in the winter.

From south to north:[3] Media related to Saskatchewan Highway 42 at Wikimedia Commons