Ray my fellow researcher, said they stumbled into a large camoflauged tunnel entrance that was half way up a steep hill along a forested ravine in southwest Oregon. It probably had a trickling stream to help get rid of excavated dirt. On the way up the ravine, they discovered the stick covered entrance. The deep tunnel bottom went out of view.
While Ray was looking up hill, past the tunnel and stick cover, he was horrified when he saw an angry huge bigfoot peeking around a tall fir tree. The head was massive and fur covered with glaring eyes. He told his friend, and they both headed back down the ravine and heard the bigfoot in close pursuit.
If a bigfoot family has no caves or mines to spend freezing winters since there are none around, what is BF supposed to do? Can two clans live in one cave, mine or earthen den network? We simply can't study bigfoot to know the answers but rare obversations of tunnel building by others like Ray can lead to a fact. Seems like if one bigfoot family makes tunnels like the one Ray found then others do to if there are no mines or caves.