Yeah, it's called Dockweiler State Beach. Great waves! If you hang out there, and get some sun, the planes fly right above you and you can watch them ascend, level off, and turn which ever way they are going. I reccommend it. The only slight problem is that the planes usually take off half way down the runway, and then there's about a mile from the halfway mark to the ocean, so by then they are a little high up, but still very close!
Also, for that hill, you're thinking of Imperial Hill. That is one, I think, that is by 25L. There's a better one I know of called Sandpiper Road. It looks all the way down 24R/L and all that side of LAX.
By the way, neither of these are "hills" but merely roads that are on an incline but have a great view.
So check out Dockweiler Beach.... Imperial Hill... and Sandpiper.
And it's my duty as an LAX fan and resident to say that you MUST go to the In N' Out on Sepulveda ON the 24R flight path centerline. Amazing hamburgers and even better view!!!
My posts/replies are strictly my opinion and not that of any company, organization, or Southwest Airlines.