National Road 70 (Norwegian: Riksvei 70) is a 162.0-kilometre (100.7 mi) long national highway that runs from the town of Kristiansund in Kristiansund Municipality in Møre og Romsdal county and the village of Oppdal in Oppdal Municipality in Trøndelag county, Norway.

From Gomalandet to the island of Bergsøya, it crosses under the Freifjorden in the Freifjord Tunnel, and then onwards to the mainland via the Bergsøysund Bridge and the Straumsund Bridge.

The tunnels and bridges are part of Kristiansund Mainland Connection, which is a toll road.

From Bergsøya to Viken, the road runs concurrently with European route E39.

From there, is runs through Tingvollvågen and Sunndalsøra and on to Oppdal, where it intersects with the European route E6 highway.