Low-growing alpine tundra vegetation of sedges and mosses prevails on sites above tree line. Bald eagles and marbled murrelets nest in forested areas. Blue grouse are found throughout the area. Northern water shrews are commonly present. Porcupines, river otters, and mink are found throughout the Section.
Mountain goats occupy habitats from alpine to forested slopes.
Sitka black-tailed deer occur throughout the Section. Moose live in habitats associated with the major river systems. Brown bears, black bears, and gray wolves occur in low numbers. Boreal toads occur in this Section. King salmon are associated with the major, mainland rivers.