OK, her is a little critique.
Generally a very nice shading, very Tom Patterson-ish, which I like myself.
However, what are the blue-grayish patches near the ridge tops. Glaciers? If so, make them white, with a hint of blue shade.
The water color is slightly too bright, not enough contrast against the background.
Consider a warmer and lighter color for the forest. Such a dark green provides a poor backdrop for labels and other objects in terms of legibility, even if it looks quite realistic.
Trails: I hate dashed lines with dashes and gaps of same length. Dash/Gap ratio of 3/1 or 4/1 looks much better in my opinion. Also consider a color with more contrast to the background.
Avoid placing labels on top of other objects. Try to find free space with a fairly monotone background, such as the area right ans slight lower of the camping symbol.