Amboy Crater
Amboy Crater is a dormant cinder cone volcano that rises above a lava field in the eastern Mojave Desert of southern California, within Mojave Trails National Monument.
It is about equidistant from Barstow to the west and Needles to the east, and south of historic U.S. Route 66, near the town of Amboy in San Bernardino County. In 1973, Amboy Crater was designated the Amboy Crater National Natural Landmark.
Location
The crater's location is southwest of the town of Amboy and the Route 66-National Trails Highway. The Bullion Mountains are to the west, and the Bristol Mountains to the northeast.Description
This cinder cone is estimated to be 79,000 years old and was formed in layers of mostly vesicular pahoehoe during the Pleistocene geological period. The interior has a solidified lava lake. Lava flows as old as Amboy Crater itself blanket the surrounding area. The most recent eruption was approximately 10,000 years ago.The crater is above sea level, about above the surrounding basalt lava plains. The scenic and solitary Amboy Crater was a popular sight and stop for travelers on U.S. Route 66 in California before the opening of Interstate 40 in 1973. Other than a stretch of U.S. Route 66 in New Mexico, Amboy Crater is one of just a few extinct volcanoes along the entire route, so generations of U.S. Route 66 travelers from the 1920s through the 1960s could boast that they had climbed a real volcano. Visits decreased after Interstate 40 opened, but have increased in recent years with the nearby Mitchell Caverns, Mojave National Preserve, and renewed historical tourism interest in "old Route 66".