Labor Day weekend is one of the busiest times of the year for Glacier National Park, but a wildfire prompted officials to close down one of the park’s most popular trails -- the Avalanche Lake Trail. Recent estimates put the Avalanche wildfire on Mt. Brown at about 45 acres.

Air crews dumped water for the third day in a row on Monday, and about 25 firefighters built a fireline.

“I immediately said that it was smoke, but couldn’t understand how that could be and then we came here and we found out,” said park visitor Judy Berg.

As fire crews battled the flames, the scene off of Mt. Brown was one of disappointment.

“A bummer…because I don’t know where we’ll go,” said Sally Wilson-Knight, visiting from Missouri.

Wilson-Knight and her husband have been making the trek to Glacier National Park from Missouri for about 20 years, and this is the first in roughly 10 they haven’t made it to Avalanche Lake.

“It’s a good hike.  You get a good workout because it’s got a lot of height to it, when you’re going up, and so there’s not too many around here that have that,” said Wilson-Knight.

“You plan on doing something that’s a little bit energetic and exciting, and well, that’s life,” said Paul Berg.

Back up the mountain, crews continued to battle the blaze. Water drops have been working to bring the flames down, but the Avalanche Lake Trail will remain closed until further notice.