West and East Mitten Buttes, Sandstone summits in Monument Valley, Arizona.

The West and East Mitten Buttes are two buttes in Monument Valley Navajo Tribal Park, northeast Navajo County, Arizona. Seen from the south they look like two giant mittens with thumbs facing inward. The left butte is broader with a sloping eroded base and a flat, slightly rounded summit; a thin spire stands at its right edge. The right butte is smaller and narrower, with a spire at its left edge. Both are deep reddish-orange with horizontal striations.

These formations began as sedimentary layers deposited in an ancient seabed millions of years ago, followed by tectonic uplift. Wind and water gradually carved away softer rock, leaving the harder sandstone peaks standing as they appear today.

The name comes from their outline: seen from the south, the two buttes look like mittens with the thumbs turned inward, and locally they are called the Mittens. They stand inside Monument Valley Navajo Tribal Park, where Navajo families still live and raise livestock on the surrounding land.

The Mittens stand 0.6 mi (0.97 km) from the Arizona–Utah state line, and West Mitten Butte is 1.1 mi (1.8 km) northeast of the park headquarters. They form a triangle with Merrick Butte about 2/3 mi (1.1 km) to the south and Sentinel Mesa to the northwest. The Mitten Shadow appears only for a few days at sunset at the end of March and in mid-September.

At the end of March and in mid-September, for a few days only at sunset, the West Mitten casts a two-fingered shadow onto the East Mitten, an effect called the Mitten Shadow. The buttes stand about 0.6 mi (0.97 km) from the Arizona–Utah state line, with West Mitten Butte 1.1 mi (1.8 km) northeast of the park headquarters.