GEORGE, Wash. - Grant County officials say a weekend wildfire that burned within three miles of the Gorge Amphitheatre was started when a campfire got out of control.

Grant County Sheriff's Office spokesman Kyle Foreman said Monday that the fire, which was put out Mondayl, has been ruled accidental.

Foreman says boaters told authorities they came ashore Sunday afternoon to start a fire in a fire ring to barbecue, but the wind picked up and the fire got out of hand.

Foreman says the wildfire was no longer a threat. Crews on Monday were mopping up hot spots. The blaze prompted evacuations Sunday, but all evacuation orders were lifted by that night.

No structures were damaged and no injuries were reported. The blaze burned an estimated 600 acres of mostly sage and grass.

The amphitheater in George, Washington, is hosting its annual Memorial Day weekend event, the Sasquatch! music festival.

View of smoke from the Gorge. @KREM2 pic.twitter.com/609TiSrky3

— Taylor Viydo (@KREMTaylor) May 29, 2016

Business as usual at The Gorge, from what it appears. We're not able to smell the smoke here. pic.twitter.com/bU8IsP5dAS

— Taylor Viydo (@KREMTaylor) May 29, 2016