Trail of Tsathogghua[1] is a Horror tabletop role-playing adventure, written by Keith Herber, with art by Steve Purcell, and published by Chaosium in 1984.

[2] Three horror adventures set in Greenland, Canada and Grand Rapids, Michigan for Call of Cthulhu, based on author Clark Ashton Smith's god-like literary creation Tsathoggua.

Trail of Tsathogghua is an adventure in which the player characters investigate a stone slab and its unusual markings which was discovered inside a glacier in Greenland by Eskimos.

[3] Rick Swan reviewed Trail of Tsathogghua in The Space Gamer No.

[3] Swan commented that "If you've been happily devouring Chaosium's Cthulhu releases, rest assured that Trail of Tsathogghua is another top-notch effort.