Book excerpt: For a traveler on the black ribbons of highways that stretch across the Great Plains, the sight of the Rocky Mountains rising up in the west is a majestic o the treeless peaks shimmer in winter with a white mantle of snow and, in summer, seem to erupt through the green belt of vegetation encircling the lower slopes. Colorado Above Treeline brings the state's highest country well within your reach. Author Jeremy Agnew describes what defines the tundra, the history that has marked it, and the kinds of plants and creatures that inhabit this unique environment. He then leads you on trips to these open, remote expanses, including scenic drives, rugged 4WD routes, and classic hikes, along the way offering many opportunities for further exploration. Practical information, fullcolor photographs and maps, and alpine anecdotes round out this introduction to some of Colorado's most celebrated scenery. Book jacket.