Amboy Crater - Kelso Dunes
This 250-foot-high crater is approximately 6,000 years old and one of the best examples in the Mojave Desert of a volcanic cinder cone. A footpath leads to the top of the cone where you can get a good view of the surrounding area. The hike to the Crater and back can take 2-3 hours. Late January through March are good times to see the wildflowers. Managed by the BLM.
Kelso
Dunes
This unique and isolated dune system rises more than 600 feet above the desert floor. The dunes were created by southeast winds blowing finely grained residual sand from the Mojave River sink, which lies to the northwest. The dunes' color is created from many golden rose quartz particles. When the dry sand grains slide down the steep upper slopes, a notable booming sound is produced. In some years, the dunes offer a nice spring wildflower display. A hike to the top and back takes approximately two hours. The area is closed to vehicles.
SEE ALSO USGS Geology in the Parks