By Louis F. Aulbach and Joe Butler. Covers the spectacular 83-mile run from La Linda to Dryden Crossing-- the famed "Lower Canyons." This is a very in-depth study of the wildest section of the Rio Grande. All campsites and rapids mapped with a running log mile by mile. Photos, maps, natural history. Wilderness Area Map Service. 7 1/2" x 10". 110 pages. Fifth edition 2015.