Mount Diablo State Park, California, USA

Mount Diablo State Park, California, USA

© Yuval Helfman/Getty Images - November 4th 2019

Mountainous landforms Sky Mountain Highland Nature Atmospheric phenomenon Ridge Mountain range Hill station Hill Morning Cloud Red sky at morning Evening Horizon Afterglow Sunrise Wilderness Atmosphere Fell Sunset Alps Dusk Dawn Mount scenery Summit Valley Landscape Tree Massif Calm National park Mist Sunlight Haze