Newly updated waterproof Guide covers stretch of Utah's Green River from Split Mountain Campground in Dinosaur National Monument to Green River, Utah, a total of 200 miles, but focuses on popular boating section--Desolation and Gray Canyons: 32 new pages include detailed river maps; sections on planning, boating, hiking; archaeology of Desolation-Gray, Nine Mile, and Range Creek; expanded text and illustrated ecology and Living Landscapes section; detailed geology text, diagrams, and photo labeling.