8.5 mile round trip to the highest peak in Texas 8,749 feet ( about a 6 hour hike with an hour at the summit)
(Guadalupe Mountains are mostly limestone
built from the ancient undersea fossilized reef)
3153′28″N 10451′36″W

Note: One man ran to the top in less then 1 hour and  in July 1982 a group of six paraplegics climb to the top in 5 days Story

Guadelupe Mountains National Park website

Video of the climb and 360 degree view of the summit

More Photos of Guadalupe