Jeff Foott / Creek in autumn, Duck Brook, Acadia National Park, Maine

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

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

Matthias Breiter / Trees in autumn along river, Sand River, Agawa Bay, Ontario, Canada

Matthias Breiter / Forest in autumn, Algonquin Provincial Park, Ontario, Canada

Matthias Breiter / Forest along lake in autumn, Laurentian Mountains, La Mauricie National Park, Quebec, Canada

Matthias Breiter / Forest along lake in autumn, Laurentian Mountains, La Mauricie National Park, Quebec, Canada

Tim Fitzharris / Deciduous forest and cliff in fall, Petit Jean State Park, Arkansas