yellow to white round light came from the sky and travelled parallel with the mountains.

yellow to white round light came from the sky and travelled parallel with the mountains then then simply disappeared, it seemed to be about a mile distant and a complete guess of altitude would be 2000ft which is far below the mountains that would be to the objects immediate left, or behind it from my viewpoint.
it was hard to discern color, it appeared to be both white and yellow during the one to two minutes, the disappearing in the air was most unusual as it was obvious that the object was on the same side of the mountain range as I was.
I had gone outside to collect laundry I had left to dry in the sun on chairs, I just happened to remember it before bed and didn't want to leave them out all night.
Note: I did not include a phone number or my address as I dont want to be contacted, I just wished to relay what I saw as it was so unusual......it was no plane or helicopter, there were no clouds, and the moon wasnt out yet.