The dark brown areas on the map represent mountains, and are typically less populated than the lowland (green) areas. Excluding the Trall, of course, but they live *inside* the mountains.
The humans generally settle near and around the coastal cities, like you've indicated. However, the human lands are expanding at a much faster rate than all the other races combined.
The Elden, however, are nomadic and travel from place to place in the wild expanses between Ilmaren, Hralfstaag and Farrowden. There are also temporary Elden settlements from the Twin Lakes and then southwest to the Eldenwood and beyond.
The Sprites dwell pretty much where you've indicated, except that there is a very busy trade route across the Azure Sea between Corte and Aranorn (the voyage taking roughly 2 months in the summer).
Hope that helps!