What Do Ground Squirrel Holes Look Like? Like their name implies, ground squirrels burrow into the ground, creating massive hideouts 15 to 20 feet long. These tunnels and dens typically have more than one entrance, which are small, two-inch- diameter holes. It is relatively easy to identify ground squirrel holes in the yard, as they are distinct from those of other burrowing pests. These holes are typically clean and devoid of excavated soil, with the surrounding grass worn from continued use. Problems with Ground Squirrel Holes As with other burrowing animals, ground squirrel holes in yards, gardens, pastures, and crop fields can quickly become a problem. Due to the very nature and size of the tunnels themselves, the ground above can collapse over time. Additionally, these holes easily become tripping hazards. Burrows around ornamental trees and other plantings can expedite the drying out of root systems. Finally, ground squirrel holes under structures can erode away the soil, causing issues with foundations. Control & Removal Finding a ground squirrel hole in the yard is an excellent indication that an infestation is present. Other signs of damage can include gnawed irrigation lines, crop damage, and tree girdling. Since their tunnel and burrow systems are so vast, successful trapping can be difficult. In order to successfully remove and control ground squirrels, contact the professionals at Critter Control.