For turtle enthusiasts, it's a challenge; for their beloved pets, it's a necessity: the annual hibernation. This guide is aimed at both readers seeking basic information and experienced keepers. It provides clear and concise information on the fundamental importance of hibernation for the species and their health. A dedicated chapter also discusses naturalistic keeping in outdoor enclosures, which is considered a prerequisite for successful overwintering. The preparation, execution, and conclusion of hibernation, including related problems and misconceptions, are described in detail. Additionally, there are important insights from veterinarian Frank Mittenzwei, a monthly overview of hibernation, and many helpful illustrations.