BURGDORF, Idaho — Over 600 firefighters are battling a wildfire that was inching closer to the Burgdorf Hot Springs, about 30 miles north of McCall. 

Crews are quickly making progress on containing the Nethker Fire.

As of Monday night, the fire is 56% contained and has burned about 2,300 acres since it was started by lightning last week.

Payette National Forest officials say cooler weather helped crews make progress on battling the fire after shallow fog and freezing temps moved in overnight.

Six hotshot crews are working along the northwest side of the fire, where it has burned into a fire scar from 2000. Officials say progress in this area of the fire has been slow due to rough terrain.

RELATED: Crews working to keep Nethker Fire away from Burgdorf Hot Springs

Warren Wagon Road from Secesh Summit to Grouse Creek reopened on Monday.

Burgdorf/French Creek Road is still closed to all non-fire personnel from the Warren Wagon junction to Corduroy.

For a complete map of road and trail closures, click here.

RELATED: 'We’re off to a slow start': Idaho fire season not yet as active as previous years

WATCH BELOW: Fire crews keep the Nethker Fire from Burgdorf