Forage on the ground mostly, but will climb small bushes and trees, and will dig shallow holes to locate food. Apparently find underground fungi by scent. Carry food in cheek pouches to food caches. Digs burrows, or may use pocket gopher burrows. Nest lined with dried grass, leaves, or shredded bark.
Suitable habitat consists of open stands of montane forest without a dense understory.
May. Young are born from early April into early September, with most births occurring May to late June. Males and females are sexually mature within the first yr. Golden-mantled ground squirrels generally are benefitted by moderate timber harvest, which opens the canopy and allows greater production of food. Adults and young may be preyed upon by various diurnal and nocturnal raptors, and by snakes, martens, fishers, bobcats, foxes, and weasels. Competition for food may occur with other rodents that feed on forbs.