The Colorado Desert is a sub-region of the vast Sonoran Desert.
The Colorado Desert is made up of broad plains of sand, rocks, mountains and a variety of scrub bushes.
The rock ridge was created by a magma chamber that at one time would have been below the ground surface. You can see evidence of the chamber in the exposed rocks on the hillside. Over time the exposed rocks are sculpted by the weather.
Along the park road are wonderful campgrounds with easy access. There are 9 campgrounds within the park offering a range of amenities. I would recommend staying at least one night in the park for a more leisurely tour and time to hike some trails.
They are reported to only grow about 3 inches a year for their first 10 years and then slow to a growth of only an inch a year! They grow to around 49' tall and can live for hundreds of years up to a thousand years old! Wow! That's something to think about!