Coal Creek Canyon, Colorado, elevation 8950 feet, 2730 m.
I saw NLC's from Colorado in 1999. After a decade, they're back! The clouds were visible in the NNW to a max elevation of 15 degrees, about the same as the clouds in 1999.
Photos taken with Sony Cyber Shot, ISO 80, f/5.2, 20 second exposure. Lens set at full tele-zoom (3x), f.l. = 18 mm. Times of the photos are 9:28 and 9:32 pm MDT. I didn't have time to set up the fancier camera.