Hibernation Location is a term used to describe the place where an animal or person goes to sleep during the winter months. The two most common crossword solutions for this term are LAIR (4 letters) and DEN (3 letters). A LAIR is a large, secluded area that is often used as a shelter or refuge, while a DEN is a small, enclosed space that is typically used as a resting place. Both of these locations provide a safe and comfortable environment for hibernation.