I'm surprised no one said Phoenix, AZ. There are four outdoor rifle ranges all approximately 30-45 minutes away from anywhere in the valley. One of which is Ben Avery Shooting Facility. shooting takes place year round and there is a match at one of the facilities almost every weekend. Rifle Silhouette, Smallbore, Benchrest, High Power, Prone, and F-Class. Then throw in all of the other state ranges. 3 Points in Tucson, 7 Mile in Kingman, Sierra Vista, and the other 5.
There is a reason I have heard some refer to Phoenix as the shooting capital of the US.