The elevation in Bymarka is from above sea level, except in the hilly northern part, which reaches down to the Trondheimsfjord. There are more than 10 lakes, and many bogs. However, Bymarka is largely covered with forest, much of it planted between the years 1870 and 1940. Some non-native trees were planted, such as European Larch and Douglas fir, and there is also Sycamore maple and European ash at the lowest elevations. The most common tree species are the native Norway spruce, Scots pine and Downy birch. Storheia, Bosbergheia, and Gråkallen are mountains that reach above the treeline (which is at approx above sea level) and have some alpine vegetation. As there are no higher mountains nearby, there is a nice view over Trondheim, the fjord, and mountain ranges including Trollheimen to the south and Sylane (which is partly in Sweden) to the east.