With over 80,000 acres of national park to explore just on the Texan side, it is wise to be strategic in advance about what places and experiences you don't want to miss when visiting. For top leaf-peeping, McKittrick Canyon is the place where the most visibly impactful autumnal magic happens. To embark on this epic journey, start at the McKittrick Canyon Contact Station and follow the 9-mile out-and-back trail to the Notch, or tackle "the hardest hike in Texas" all the way to The Ridge. This particular trail leading to Devil's Hall is shorter than McKittrick, but more strenuous due to the shifting rocks. Though this trail may not be ideal for first-time and casual hikers, the difficulty comes with many rewards: breathtaking canyons, tall trees, and other geological wonders await.