Hockey Island represents Riley's love of hockey. Its features include giant representations of hockey material like sticks, skates and a helmet, along with a golden trophy.
Hockey island was first created when a young Riley first hit a hockey puck into a goal. The island was used throughout Riley's childhood to power her hockey skills. When Joy, Sadness, and the Core Memories are taken out of Headquarters, Riley is unable to play hockey at the first tryouts in San Francisco. This causes her to become angry and quit, causing Hockey Island to fall into the Memory Dump. When Joy and Sadness return to Headquarters and learn to create mixed memories, Hockey Island is restored by an angry and happy memory and Riley continues to play hockey for the Fog Horns.
- In What Should Riley Do? a storm cloud appeared above it, signifying that Riley had lost a game.