This is a large area covered with the same substance thunderpaths are made of. It is empty during most of the year but attracts twolegs during New-leaf, when they bring their wooden boats and ride them into the lake. The twolegs are usually to busy trying to keep their boats under control to bother the cats, but twoleg kits will sometimes catch sight of a cat and run after him. This place is part of the border between RiverClan and ShadowClan.
