The Tunnel Fire was a wildfire burning in Coconino National Forest and Sunset Crater Volcano National Monument, the Lack Bill Park neighborhood north of the city of Flagstaff, Arizona in the United States, and along U.S. Route 89. The fire was named after a tunnel landmark on Waterline Road, near where it ignited on Sunday, April 17, 2022. On June 3, 2022, the wildfire was declared 100% contained by the Arizona Emergency Information Network. It had burned 26,532 acres (10,737 ha) and had destroyed 30 homes. No fatalities or injuries were reported.

The fire was first reported on April 17, 2022, at approximately 4:22 p.m. MST. The cause of the fire is currently unknown. AZIEN said that, while an investigation found a "specific origin area and excluded many cause determinations", the exact cause was still unknown

The fire is 100% contained as of June 3, 2022.

The fire destroyed 30 homes.

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U.S. Route 89 was closed between mileposts 423 and 445 because of the wildfire.