I really like the style you've chosen for this. The mountains look fantastic and they give the map a lovely textured feel, especially when zoomed out. I need try this mountain style myself one of these days.

If I had to nitpick, it'd be over the the map title at the bottom. I don't know if you're planning to work on this later on, but it looks a bit plain and pedestrian at the moment. Maybe I'm just used to seeing highly decorative titles and that makes me feel this one looks a bit unfinished. But that aside, you're doing a cracking job!