Though these lakes vary in shape and size, and though each is set in a different topography, many have a number of like features and are surrounded with somewhat similar verdure. A typical lake is elliptical and about one fifth of a mile long; its altitude about ten thousand feet; its waters clear and cold. A few huge rock-points or boulders thrust through its surface near the outlet. A part of its circling shore is of clean granite whose lines proclaim the former presence of the Ice King. Extending from one shore is a dense, dark forest. One stretch of low-lying shore is parklike and grassy, flower-crowded, and dotted here and there with a plume of spruce or fir. By the outlet is a filled-in portion of the lake covered with sedge and willow. In summer, magpies, woodpeckers, nuthatches, and chickadees live in the bordering woods. In the willows the white-crowned sparrow builds. By the outlet or in the cascades above or below is the ever-cheerful water-ouzel. The solitaire nesting near often flies across the lake, filling the air with eager and melodious song. Along the shore, gentians, columbines, paintbrushes, larkspur, and blue mertensia often lean over the edge and give the water-margin the beauty of their reflected colors. These lakes above the limits of tree-growth do not appear desolate, even though stern peaks rise far above. The bits of flowery meadow or moorland lying close or stretching away, the songful streams arriving or departing, soften their coldness and give a welcome to their rock-bound, crag-piled shores. Mountain sheep are often visitors. They come to drink, or to feed and play in the sedgy meadow near by. Ptarmigan have their homes here, and all around them nest many birds from the southland. Into these lakes swift waters run, and here the snowy cataract leaps in glory. From the overshadowing cliffs, flattened and lacy streams flutter down. During the summer there is the ever-flowing harmony, the endless animation, of falling water; and in winter there is the silent and architectural symphony of the frozen waterfall. Many lakes during summer are partly edged with inthrusting snow and ice piles; from time to time fragments of these piles break away and become miniature icebergs in these small arctic seas.