Scenic stretch of the Upper Guadalupe, infrequently run due to its length, remoteness, and the scarcity of rapids.
Texas Whitewater mentions "numerous small rapids" on this stretch but provides no specific beta. Satellite scouting shows a lot of flat water. There are no campgrounds or other facilities along the run, making logistics for a multi-day trip difficult at best.
Distances and gradient measured using GIS tools in 2015. Difficulty rating and range of recommended flows are a guess.