The Chittenden Brook, Moosalamoo, and Silver Lake campgrounds will close for the season on Oct. 15.
Officials say extending the season will give the public an opportunity to camp during the fall foliage season and attract visitors the area.
Chris Mattrick, district ranger on the Rochester and Middlebury Ranger District, says autumn is one of the most beautiful times of year on the Green Mountain National Forest.
All three are primitive campgrounds with no electric hookup or sewer provided. Water is available from hand pumps at the Moosalamoo Campground.
Silver Lake is a hike-in campground.