This is still the best for selecting among the hundreds of miles of Yosemite trails: but for on the trail please carry (and know how to use!!) a detailed topo map and compass and for the techies go ahead and GPS but remember batteries die.
The federal topo maps are works of art in their own right. If on the trail descriptions are a must either photo-copy the pages as others have suggested or pick up one of the smaller Wilderness Press guides that focus on topo maps worth of the area.
A recent alternative to individual maps is the state CD from National Geographic / Trails Illustrated that gives you the entire state of california on your computer in zoomable, annotatable detail:… Read more