I was riding my bike to the Longs Peak TH, outside RMNP at around 5:00am one winter - around 9,000' - clear sky. A streak just like this went across the sky. I figured it was either a roman candle or the start of WWIII. Neither turned out to be true. Good summit of Longs Peak, that day.
I was at the base camp of Challenger Point / Kit Carson Peak, laying out watching the sky after dinner. I saw something similar to this but a bit more green and it shot off sparkles like a firework as it burnt up. Did not make the summit the next day though!