The highs and lows of the day: from Guadalupe Peak in Texas at 8649 feet to Carlsbad Caverns 750 feet below ground; from 104 degrees in the desert to 56 degrees in the caverns.

From the right, El Capitan at 8085 feet and Guadalupe Peak at 8749 feet (the highest peak in Texas). The prior pics are from the other side so El Capitan looks higher.