THE FOGGIEST IDEA

When water vapor condenses, fog appears. There are many types of fog, including sea fog, valley fog, ground fog, advection fog and freezing fog. In Arizona, the most common forms of fog are radiation and precipitation. It's rare, but when it does show up, the fog adds a beautiful layer to an already beautiful landscape. A Portfolio Edited by Jeff Kida

Morning mist catches the rays of the rising sun at Lee Valley Reservoir in the White Mountains. With an elevation of 9,423 feet, the lake is the highestelevation reservoir in Arizona. LAURENCE PARENT

The red spines on a group of barrel cactuses stand out on a cold, foggy day at South Mountain Park in Phoenix. Consisting of three mountain ranges, the park is among the largest municipally managed parks in the United States. PAUL GILL

Lichen-covered rocks and windblown pines are the entirety of the view at Marble Viewpoint, an overlook north of the Grand Canyon's North Rim. Typically, this overlook features an expansive view that includes Marble Canyon and distant Navajo Mountain. TOM DANIEL