We have the same setup here in Yuma County with Adare Range. It is state owned. The BP, YCSO, and YPD have their own range on the west end. It’s free to use. The only thing asked is you police up your brass before you leave. I friken love living in Arizona!
I know the range well, used to work at YPG. Met my wife in Yuma, bought her her first gun, a pistol, and she went to the range every morning before it got hot. Loved working there, every day was an adventure. Especially Miners Camp, where we stopped on our way back to town. The bartender, Shirley,knew more jokes than I can remember. Good memories.