Within the last 7 miles (11 km), SR 266 slowly curves northwest as the route approaches the Nevada state line.

As the route has more connections to Nevada than the rest of California, the California Department of Transportation (Caltrans) and the Nevada Department of Transportation (NDOT) have entered into a joint agreement on snow removal and other short term maintenance duties for the route.

[2] The section of SR 266 from the western terminus to the junction with SR 168 is designated by the California State Legislature as eligible by law for the State Scenic Highway System;[3] but it is not officially designated as a scenic highway by Caltrans.

[4] The entire route, consisting of two lanes for two-way traffic, traverses on the flat land in the Fish Lake Valley east of the White Mountains, and it can serve as transportation of agricultural goods between California and Nevada via the route's only junction (SR 168).

[2][9] Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage.