I finally gave up on one of my tubeless tires since I don't have a compressor (the rear tire keeps deflating and I can't get a good seal with just my floor pump). I switched it back to a regular tube -- which was more of a process than I realized it would be.
Then I went for a ride around the Louisville trails (Harper Lake, Davidson Mesa, Hwy 36 bike path, Coal Creek). As with the moon-rise last night, I turned around on the Coal Creek trail just in time to see this sunset behind me. It faded while I was taking a few pictures, so I'm glad I turned around in time to see it.