Jeff Foott / Trees in fall near Calf Creek Falls, Grand Staircase-Escalante National Monument, Utah

Sumio Harada / Lake in fall, Bowman Lake, Glacier National Park, Montana

Yva Momatiuk & John Eastcott / Fall colors in mountain meadow, Rocky Mountains, Colorado

Yva Momatiuk & John Eastcott / Quaking Aspen (Populus tremuloides) trees in autumn, Rocky Mountains, Colorado

Yva Momatiuk & John Eastcott / Quaking Aspen (Populus tremuloides) trees in autumn, Rocky Mountains, Colorado

Yva Momatiuk & John Eastcott / Quaking Aspen (Populus tremuloides) trees in autumn, Utah

Yva Momatiuk & John Eastcott / Quaking Aspen (Populus tremuloides) trees in autumn, Utah

Tim Fitzharris / Mist over lake, Emerald Lake, Emerald Lake State Park, Vermont

Tim Fitzharris / Little Pigeon River cascading among rocks and colorful Maple leaves, Great Smoky Mountains National Park, Tennessee

Tim Fitzharris / Autumn deciduous forest, Shenandoah National Park, Virginia

Tim Fitzharris / Autumn leaves on wet boulders in stream, Great Smoky Mountains National Park, North Carolina

Tim Fitzharris / Looking up at blue sky through a canopy of fall colored Aspen trees, Colorado