No one has posted a night shot in a while.
Old Faithful at 8pm one October night. ISO 1600 Nikon D600 12-24 lens at 2.8/ 1.6 sec exposure.
The red glow is someone shining a light at the geyser.
I was going to make a time-lapse but there were too many people flashing lights at the geyser and it was too cold to stand around another 90 minutes to wait for the next eruption. Besides the sleeping bag was calling me.

telling us the glow is a man made phenomenon just ruins the whole atmosphere no pun intended
i am waiting on a couple of bits from china that i could not be bothered making to finish of a barn door tracker that i have been working on
hopefully i can post something shortly. i think the boat has taken the scenic route