What is the best route from Redding Ca to 505 Parnassus Ave San Francisco?

The best route from Redding, CA, to 505 Parnassus Ave, San Francisco, is to take I-5 South to I-580 West. Merge onto I-80 West, and then take the exit toward CA-1 South. Follow CA-1 until you reach Parnassus Ave. This route typically offers the quickest access to San Francisco, depending on traffic conditions.