The Rattlesnake Fire was a wildfire that burned 26,072 acres (10,551 ha) in Navajo and Greenlee Counties, in Arizona.

[4]: 1–2 Around 1:30 PM (MST) on April 11, 2018, a 165-acre (67 ha) fire was detected east of Rattlesnake Point, on the Fort Apache Indian Reservation in Navajo County, Arizona.

[6][7] As a result, the burned area grew rapidly; on April 12, it spread to 400 acres (160 ha) and into the Apache-Sitgreaves National Forests.

[8][9] The fire expanded into the San Carlos Indian Reservation the next day and then,[10][11] on April 14, into the Bear Wallow Wilderness, in Greenlee County.

[15] Firefighters were able to make substantial progress on April 22 due to improved weather, and estimated that the spread of the Rattlesnake Fire had been 25% contained.

[25][4] The United States Forest Service began investigating the cause of the Rattlesnake Fire on April 14, suspecting human activity.