The young are weaned by late June or early July, and soon thereafter strike out on their own. They frequently occupy abandoned dens. The numerous new burrows which appear during late summer are dug by older woodchucks. The daily range of the woodchuck is usually between 50 and 100 feet from its den. This distance may vary, however, based on the availability of food.
Woodchucks are very sanitary at their den sites.
They maintain clean burrow systems and annually replace nest materials. A burrow and den system is often used for several seasons. The tunnel system is irregular and may be extensive, ranging from eight to 66 feet in total length. However, systems have been documented totaling 114 feet in length. There are always two or more entrances to each burrow system.