 In Arizona, the Yaqui longfin dace only occurs in the southeast, in Cochise County (in both the endorheic Sulphur Springs (Willcox Playa) and Río Yaqui drainages).However, it is also found in northern Mexico, in the Yaqui, Sonora, Mayo, Fuerte and Sinaloa River Basins of Sonora and Sinaloa.The Yaqui longfin dace was re-introduced into the Yaqui River on the San Bernardino Wildlife Refuge and the Leslie Creek Wildlife Refuge including West Turkey Creek at Rucker Canyon.