CA-78 goes from Oceanside to CA-86 north of El Centro. My daughter and I drove
the section from CA-86 to CA-S3 in December 1996 on our tour of the California
desert parks.
CA-86 goes from El Centro to Indio. This was also on our December 1996 trip.
CA-89 runs from Mt. Shasta to just south of Lake Tahoe.
CA-98 runs just north of the Mexican border through Calexico.