It depends how you see the mountain range Jim, I think. Not all mountain ranges are crowded with mountains in reality, after all. Some of the "empty" spots could be hidden valleys, or even plains, with impassible mountains all-round, like the classic Shangri-La.

If the Ash Mountains are more than a name (so something like volcanic ash), maybe the valleys there could be grey with ash too, where nothing will grow, say, if you want a little more variety. Or maybe a scatter of a few trees here and there (really as much for decoration as indicating any genuine small woods, perhaps).

Well, as the trees are symbols, they can be easily resized and stacked as I suggested, just as they are now. I've worked this in some of the dungeon/small overland map styles, though of course it works better in some styles than others.

Completing the circuit is Embra - Summerset in the northwest, with its small village of single-storey properties, the River Clack with a bridge (albeit the bridge seems detached from the village rather), both the main Clack Valley tributaries, plus a curiously unlabelled third tributary stream, which seems more significant than the named Silverburn (a deliberate choice!). However, dominating the map's centre are two substantial lakes and a marsh:

Next-up will be the first of Embra city's contents, the Enclosed Places.

The western village of Embra - Evenside carries things to an even stranger place, now with a "castle", Caer Sidi, that is really just an elaborate stone fence around an open field! The Clack here isn't a stream, but a series of ponds linked by marshes that have a couple of bridges over the swampier spots. There's also a huge orchard, and a second dry valley with a scatter of marshy ponds along it too:

This is one map which I think especially benefits from a means to help identify which mapped items are genuine buildings:

Embra - Winterset in the southwest moves things towards a somewhat different nature, with many clustered properties, and no River Clack. Water comes instead from a pair of well-fountain pools at two midline crossroads, while the not-quite enclosed areas of Aine's Pastures are connected by a bridge that arches over the northern trail, a particularly obscure - thus clearly Faerie - feature:

The interior views show what the layout of the properties really is, although there are many fewer two-storey buildings, as the lower image here demonstrates: