I actually normally make the mountains deeper, but I was worried I was overdoing it and making it look cartooney, especially considering the scale of the map.
Again I am not sure at this scale if I could show much witht he river, will think of it for next time
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One thing that helps rivers integrate into the land is tapering the river feature itself. I suggest you varying your line thickness to really ground the rivers into the landscape.
Something witty and pithy