The dance flies (Diptera: Empididae) are important among flies, in part for their intermediate evolutionary relationships and for their complex epigamic behavior. Phylogenetically they can be considered a link between the lower flies (Nematocera) and the higher Brachycera like Calypterates and Acalypterates. In addition, the family distinguishes itself among the flies in having complex epigamic behavior. Despite being a large fly family, records of the numerous possible species in Utah are scattered in the literature and clearly incomplete. A survey of this family on Mount Timpanogos in North-Central Utah was conducted during the 2003 and 2004 field seasons. So far we have collected more than 24 genera and an estimated 33 species. Mount Timpanogos was chosen for its steep altitudinal gradient (1463 meters to 3581 meters) and for the diversity of habitats it presents: from alpine tundra above timberline to shrub steppe and playa wetlands near the valley floor. We will be producing a photo guide to the empidids of Mount Timpanogos, Utah. The biogeographic distribution of this family throughout the state of Utah is also being examined in conjunction with other survey and inventory projects in our laboratory.