Big Bend or Rainbow is an unincorporated community in Placer County, California.

[2] Big Bend is located on the South Yuba River, 1 mile (1.6 km) east-southeast of Cisco Grove.

[2] Big Bend was the site of a travelers' inn and grocery store on the Lincoln Highway.

[4] Today Big Bend consists of a US Forest Service campground, a fire station, and a few vacation homes.

This Placer County, California-related article is a stub.