The first three were taken at the same time just at sunset. The clouds looked very odd in all directions. Pikes Peak is 8000 feet higher than in town (14,118 compared to 6,118) and these cloud formations were at least 5-6 times the height of Pikes Peak. This last one was about 40 minutes later and 15 miles farther away, just as the stars were coming out and several thunderheads were still growing and starting to become active. Lightening was starting to appear under the left hand side of this formation.