Whitewater Rivers in and near the Chisos Mountains, Texas 1   Rio Grande Class I-II - 23 miles long (Rio Grande Village to Stillwell Crossing) Brewster County 2   Rio Grande Class I-II - 20 miles long (Solis to Rio Grande Village) Brewster County 3   Rio Grande Class II - 10 miles long (Talley to Solis) Brewster County