The groundhog prefers to habituate pastures, loosely wooded fields, and areas of dense shrubs. Due to continuing deforestation, the groundhog habitat is expanding and their numbers are ever on the rise. The groundhog prefers easy to dig loam and sandy loam soil. Its burrow opening will typically be found on the edge of a pasture or field with an opening approximately 10 to 12 inches in diameter and a large mound of dirt nearby. The tunnels of the groundhog can reach up to 45 feet in length and up to 5 feet in depth. Many often have a "drop hole" near the main burrow opening up to 2 vertical feet in depth that the groundhog will use for quick escapes from the surface. Each groundhog burrow characteristically has up to four well hidden auxiliary entrances without the presence of dirt mounds. When hibernating, the groundhog´s den will often be found under a stump, rocks, tree roots, or some other such protection.