While the overall clipping is decent, there are some issues. You can jump on edges of these boxes.
Maybe make here so instead of a flat clipbrush? Will feel way more natural imo, this is too deep for just a brush.
Maybe this problem is just mine, but the glass here renders quite weirdly.
These crates in the lower route fade out before they aren't seen (espically the left one).
Two of trees fade out for some purposes unknown to me.
A nodraw seen. Also below the fov there is a fence. It's there for smoother movement, yes, but it still looks like it's put here for no real purpose.
I see the continuation of the coast underwater, but the water just clips this rock off, like it ends just there, not fades out like the coast.
Minor: you're rendering at least one unseen face, if it's displacement, and quite a bunch, if it's not.
Low lightmap resolution here.
This corner is not clipped. The opposite is.
These bottoms should've been nodrawed, I believe.