Dark brown potato-shaped object seen over desert mountains.About 10:15am I was driving a convertible with the top down westbound on State Highway 58 a few miles from Barstow, CA on my way to Edwards Air Force Base. The morning sky was clear blue with some thin clouds over the mountain range on my left. While I was looking at those mountains I noticed a stationary dark brown, potato-shaped object hovering below the clouds and between peaks in the mountains. I slowed down a bit and kept looking at it. I encountered traffic ahead of me and had to take my eyes away from the object for a moment. When I looked over again it was gone.