This is as good as any map you will find on the park, certainly in the UK.
This map covers the whole park printed on both sides, one side north and the other side south. Other maps in the same series cover the park in four quarters.
Scale is good and the map is detailed. Roads and trails are clearly marked, including the distances of trails. Contour lines are shown at 100 ft intervals. Spot hights are in feet. Rivers are clearly marked and named.
Areas with Ranger Stations, gasoline, lodging, camping & RV parks and places to eat are highlighted.
All printed on what feels like good quality 'paper' which is described as made from 100% plastic and said to be waterproof and tear resistant. This version was revised in 2008.