I am guessing a pickup….and yes going like a bat out of hell with fast turnaround.
See the color change at Denver as it lands -that is altitude reduction, then changes back as it climbs out again. The ADSB was not turned off, so the track is continuous. That likely means taxi up, pickup a passenger and roll right back to the runway….
This picture may help you see altitude colors better.
Correct On Colorado Springs. They were in a hurry … see the zoom in, you can see the plane on runways and taxiway to the terminal and then back out
Baker - extend the planefag - Interesting high speed trip between DC and Colorado Springs and back toward DC. Looks like a fast drop-off, or pick-up. Someone needed to be somewhere else really fast.