River Mountains Trail Partnership Advisory Council

Total Votes: 151  
Interest: 1831

1000 Rancho Circle
Las Vegas, Nevada 89107-4623

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Geology of the River Mountains


This phrase will certainly get the attention of many, particularly those who are not familiar with the geology of the River Mountains. This certainly explains why they are so rugged!

The River Mountains are composed of tilted and faulted mid-Miocene (15 to 12 million years old) andesite and dacite lava flows. Two volcanoes, the source of most of the lava, have been identified in the River Mountains.

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River Mountains Loop Trail
1000 Rancho Circle
Las Vegas, NV 89107-4623

The River Mountains Loop Trail is a 35-mile loop trail around the River Mountains. It is for hiking, biking, running, jogging, horse back riding and other non-motorized uses.