Not my sighting but got a mate in Denver who messaged me last Friday saying he'd seen something weird the night before. Didn't say triangular but described it as "not normal shaped." He's not into any of this stuff so he wouldn't know a TR-3B from a paper plane, which honestly makes it more interesting to me.
Question for anyone who was there - was it completely silent? My mate couldn't remember if it made noise or not and that detail matters a lot. The silent ones tend to get reported differently to the ones with a low hum. Also roughly what time Thursday are we talking? Trying to work out if the timeline lines up with what he saw.