Livermore has one of the best trap fields in Northern California. Coyote Valley Sporting Clays has one of the best sporting clays ranges in the area. Richmond has one of the most active action pistol programs in Northern California. USI has a wide variety of activities.
We might be able to help more if you are more specific. For example, what kind of shotgun shooting to you do? Tactical? Trap? Skeet? Sporting Clays? What kind of pistol? Plinking? Bullseye? USPSA? IDPA?