The Desert Marksmen Rifle & Pistol Club in Angeles Nationald Forest is (normally) a 600 yard range. Once or twice a month the staff closes the normal bench area and you shoot from the bench on the hill 400 yards behind the normal benches, which makes it a 1000 yard range. They also have a 100 yard rimfire/blackpowder range and a 25 yard pistol range off to the side. Anyway, you have to be an NRA member to join the range club, then it's $60 to join and $40 anually to stay a member. Other than on match days, it's closed to the general public. Also, there's no range master on non-match days. I'm not sure how long it takes to get there from LA, but it's about 45 minutes to an hour Northeast of the previously mentioned Six Flags Magic Mountain. PM me it you want more info.