There are growing numbers of lichens observed outside their expected distributions. A recent discovery of Xanthoria parietina in Provo, Utah, USA is added to that list. Other individuals of this species have been noted in inland western United States, but this specimen was believed to be the first sighting of X. parietina in the Great Basin. Herbaria records were investigated for distribution data for other collections of X. parietina outside of their typical habitat. The identity of this unexpected lichen occurring in Provo was confirmed via DNA sequencing, and based on herbarium records, was found to be the second known occurrence in the Great Basin. This discovery raises questions regarding human facilitated dispersal and establishment of lichens. Key words. Conservation, Great Basin, lichenized fungi.