South Rim via Laguna Meadow Trail (and Colima Trail) Professional Review and Guide
"The South Rim is probably the classic hike of Texas. Although the trip is fairly strenuous, almost any Texas hiker worth his or her salt will someday try to hike to the South Rim. Few other hikes in Texas can surpass the quality and sheer quantity of views along the trail. On clear days, the views cover most of the Texas Big Bend country and far into Mexico.
To fully enjoy the trip, try to allow two or three days on the trail. People in good shape can do the round-trip hike in one day, however. Not surprisingly, the hike is popular. Although there are many designated primitive campsites, it may be difficult to obtain one during Thanksgiving or college spring break.
This route to the South Rim is less steep than the other primary route using the Pinnacles and Boot Canyon Trails, although it still requires the same net elevation gain. Often the two routes are combined into a loop trip. Water can sometimes be obtained in a pinch at Boot Spring, but do not count on it without checking on the spring’s status before you start; it does dry up at times. It is best to carry all the water you will need."