Wilderlands of the Fantastic Reaches is a supplement for fantasy role-playing games published by Judges Guild in 1980.

[2] The regions of the Isle of Dawn (#15), the Southern Reaches (#16), the Silver Skein Isles (#17), and the Ghinor Highlands (#18)[3] are shown in full detail on the judge's maps and are roughly sketched out on the players' maps.

The booklet describes and gives the location of many of the villages, castles, islands, ruins, relics, and monsters.

[4] Fawcett commented that "This set of maps and their index is one of the most massive efforts of the Judges Guild.

These maps when viewed as a whole are a gigantic effort and have to be considered one of the major projects in roleplaying games.