Moapa Valley National Wildlife Refuge

Moapa Valley National Wildlife Refuge. 
Moapa Valley National Wildlife Refuge (NWR) is  part of the Desert National Wildlife Refuge Complex.   “The unique geology of the Moapa Valley National Wildlife Refuge makes it an important location for native wildlife. There are five major thermal springs in Moapa valley, three of which are located within refuge boundaries. The warm springs habitat supports many unique species.”
Here is the Refuge website.  Brochure Call 702-515-5225 for information and hours.  The refuge is closed during the summer.  Satellite view map
A 0.5 mile loop trail provides interpretive information.