Goblin Valley State Park is home to thousands of hoodoos and hoodoo rocks, referred to locally as "goblins", which are formations of mushroom-shaped rock pinnacles, some as high as several meters. The distinct shape of these rocks comes from an erosion-resistant layer of rock atop softer sandstone.
The park lies within the San Rafael Desert southeast of the east limb of the San Rafael Swell and north of the Henry Mountains. Utah State Route 24 passes about four miles east of the park. Hanksville lies 12 miles to the south.