Seaside Hill is a stage from the Sonic the Hedgehog game Sonic Heroes where it was the first stage of the game. Seaside Hill appears in Mario & Sonic at the Olympic Winter Games as the Dream Event location for the Dream Alpine.
The course retains some elements from the original game such as the checkered landscape and famous shuttle loops. Elements from Ocean Palace, the second stage in Sonic Heroes are also used such as the huge rolling rocks and the inside of the ruins. The stage itself is constantly going downhill and is covered in snow to suit the skiing. Eggman's robots patrol the stage and will wipe players out who come in contact with them.
- In Mario & Sonic at the Olympic Winter Games, Seaside Hill appears as a location and Ocean Palace appears as an unlockable song. In Mario & Sonic at the London 2012 Olympic Games, Ocean Palace appears as a Dream Event Location and Seaside Hill as an unlockable song.