SR 330 is also known as City Creek Road in the San Bernardino Mountains.

SR 330 consists of approximately 15 miles (24 km) of six-percent grade road, and is one of three roads from the San Bernardino Valley to the resorts of the San Bernardino National Forest.

In December 2010, a part of SR 330 was washed out, forcing the closure of the entire route for several months.

Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment of Route 30 as it existed at that time, and do not necessarily reflect current mileage.

[1] Segments that remain unconstructed or have been relinquished to local control may be omitted.