Oregon Route 70 is an Oregon state highway that runs between the towns of Dairy, and Bonanza in south-central Oregon The highway is known as the Dairy-Bonanza Highway No.

23 (see Oregon highways and routes) and is signed east-to-west.

Oregon Route 70 begins (at its western terminus) at an intersection with Oregon Route 140 in the town of Dairy.

It heads east-southeast for seven miles (11 km), ending in the city of Bonanza.

The entire route is in Klamath County.