Awesome map. The only really suggestion I can give is you have some river branches that don't seem to have a source. The main rivers that follow out from the forest down to the coast are fine, most likely sourced by the melting snow from the mountains, that's fine. But I noticed you have a few small branches that begin outside the forest and quickly join one of these main rivers, but no clearly defined source for them. At this scale, I imagine we'd be able to see even small lakes that would possibly source them.

Amazing work, though