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A fast-moving wildfire burned through nearly 1,000 acres inside a national park in Montana on Tuesday, officials said.

The Reynolds Creek Wildland Fire was first reported about 6 p.m. ET on the east side of Glacier National Park, according to a news release by the National Parks Service.

Incredible to watch the #glacierfire earlier this evening from a boat on #stmary lake. Many more pictures to come... pic.twitter.com/6ay3ohsknm — Erin Conwell (@ErinConwell) July 22, 2015

Within hours the inferno prompted evacuations of a park inn and campground. Officials also closed a portion of the Going-to-the-Sun Road, a nearly 50-mile roadway that runs through the park.

Smoke plume from Reynolds Creek fire in Glacier National Park as seen on visible satellite imagery this eve. #mtwx pic.twitter.com/12GkoZoUG6 — NWS Great Falls (@NWSGreatFalls) July 22, 2015 -

The fire was moving quickly in heavy timber and has “extreme spread potential,” parks officials said. A temporary flight restriction was imposed over the fire area and additional resources were expected to arrive Wednesday to help deal with the blaze.

Another 1,000-acre fire was reported about 200 miles south in Broadwater County.

The Cabin Gulch Fire threatened structures and prompted evacuation warnings Tuesday, according to the U.S. Forest Service. Officials said that blaze was approximately 15 percent contained.