Beaverhead-Deerlodge National Forest: Largest state park in Montana, spanning over 3.3 million acres.
Custer-Gallatin National Forest: Second-largest state park, covering approximately 3.1 million acres.
Flathead National Forest: Encompasses around 2.4 million acres of wilderness and outdoor recreation areas.
Helena National Forest: Spans over 1.6 million acres, offering diverse landscapes and outdoor activities.
Lewis and Clark National Forest: Covers approximately 1.6 million acres, known for its scenic beauty and recreational opportunities.
Kootenai National Forest: Encompasses around 2.2 million acres, featuring rugged mountains and pristine wilderness areas.
Lolo National Forest: Covers over 2 million acres, offering abundant opportunities for hiking, camping, and wildlife viewing.
Bitterroot National Forest: Spans approximately 1.6 million acres, known for its stunning mountain scenery and outdoor recreation.