A maze of evergreen trees covers the mountainsides in subalpine areas. Hidden among the trees are crystal clear lakes and fields of wildflowers that may surprise you. The subalpine ecosystem occupies elevations just below tree-line between 9,000 and 11,000 feet.
A typical subalpine forest may consist mostly of subalpine fir and Engelmann spruce. However, previously-burned areas may contain varying amounts, or even almost pure stands, of lodgepole pine. Lodgepole seedlings do well in sunlight, often abundant after fire, but once the forest is established, plant succession may result in increasing amounts of spruce and subalpine fir. Ground cover in a previously-burned forest area often includes two species of huckleberry.
Limber pine, with flexible twigs and needles in groups of five, may also be part of subalpine forests. In high, windblown areas, limber pines often grow into grotesque shapes.
Engelmann spruce and subalpine fir, which grow straight and tall in the lower subalpine forests, become shorter and deformed nearer treeline. Even as the trunk grows upward, strong, cold, dry winds may destroy new growth on the windward side, leaving permanent growth only on the lee side of the trunk. Trees with branches on only one side are often called banner trees or flag trees.