SR 7 begins at the Calexico East Border Station, which is open from 6 am to 10 pm, seven days a week.

At its northern end, SR 7 turns into County Route S32 (still Orchard Road) as it intersects with I-8.

[15] California State Route 7 was used from 1964 to 1983 for the Long Beach Freeway in the Los Angeles metropolitan area, which is now Interstate 710.

Postmiles were measured based on the road's original alignment and do not necessarily reflect current mileage.

The "S" prefix refers to the spur route that splits off at the Calexico East Port of Entry to pass through the western customs checkpoints for cars.