If you park at Horton Plaza, be sure to take your ticket and get it validated at the theatre. Then you can get $10 parking for 3 hours.
You can also try a parking reservation site, like Spot Hero. I got $5 parking last time I used it.
Either Horton Plaza or wherever you can find a spot downtown! I usually park up by 4th or 5th and Ash or Birch then walk to the Theatre.
You can park next door at Horton Plaza and Balboa Theater will validate your parking.
Horton Plaza is close and relatively inexpensive. There may also be another service nearby that can accommodate you.
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