Been guiding snowmobile trips around the forest and up in yellowstone heavy for the past few weeks now....We still have a few grizzlies running around through the valley. One in particular has 3 cubs with her still. . I am aware plenty that bears have the tendency to come out for a walk around in the early spring and go back in for a while more. But never have i heard of a bear still running around in 4 feet of snow in January with cubs. I have heard they will not go into hibernation if they do not have the fat saved to survive the winter. If thats the case..