The roundtail chub is a cyprinid fish in the genus Gila, of southwestern North America. It is native to the Colorado River drainage basin, including the Gila River and other tributaries, and in several other rivers. It is part of the "robusta complex", which includes the Gila robusta robusta, G.r. grahami, and G.r. seminuda.

Fossil Creek is a perennial stream accessed by forest roads near the community of Camp Verde in the U.S. state of Arizona. Primary access is from Forest Road 708 off Arizona State Route 260 east of Camp Verde. A tributary of the Verde River, Fossil Creek flows from its headwaters on the Mogollon Rim to meet the larger stream near the former Childs Power Plant.