Belmont Hot Springs (a.k.a Udy Hot Springs) is located 1 mile (1.6 km) southwest of Plymouth in northeastern Box Elder County on the flood plain of the Malad River. The springs consist of about 50 orifices that form a roughly semicircular pattern on the western flank of the river. The springs flow from fractured Paleozoic limestone at a small escarpment between the flood plain and the higher terraces of the Malad River Valley. Water temperatures range from 93° to 125°F (34° to 52°C). A large lake containing several spring orifices is the most conspicuous feature of the springs, but a series of smaller orifices given names such as “Indian Pool,” Morning Glory Hole,” and “Mud Pots” are present south of the large lake