Route3D Yosemite Lite is a three dimensional map of Californias central Sierra Nevada featuring high detail topographic maps and aerial photography. Play back routes like a movie, showing each turn. Elevation profile shows the ups and downs of the route.
This is the free ad supported Lite version; the full version Route3D Yosemite to Whitney has more features. Both versions contain preloaded topo maps that operate without an internet connection.