That looks very nice indeed. The only issue I can see is the little pool on the left which has two exits to the sea. Still, I can talk cos on mine I have none at the mo.
Very nice colour and shading as usual. I agree that the snow needs some work but I find snow hard as I have mentioned quite a lot recently. So no tips from me on that front.
This map is gonna be the one to beat I think.
Edit -- ahh whoops zooming in I see that it is two seperate tributaries. On the lightbox it really looks like one single line tho.