Yeah, what RW said. www.angelesranges.com
Definately check out their site, download a discount ticket, the release form and the map. If your coming from Oxnard, it might be easier for you to cut across the 23 to the 118 and take that to the 210. When you get on the 210, the first exit is Osborne and that's where you get off. Take a left, go under the Fwy and the first light go left. It's alittle over 2 miles to the turn off, there's signs for it. You'll go up a small hill and the road will split, stay to the left. The road will take you straight into the range, the part of the range you'll see is the rifle range. You can drive up to the benches to drop off your gear.
Make sure if your coming to be early! ARM USA is having their shoot the same day, range will be full. The snack bar is actually a guy that shows up with one of the weenie carts. If you can't stomach it, bring your own stuff. There's a 7/11 at the Osborne exit where you make your 2nd left.