National Geographic Trails Illustrated Maps

I own the one for Sequoia & Kings Canyon, for the Canyons of the Escalante, and the one for Grand Canyon. Probably more than that, actually, but those are the ones that I know I have. They are great maps for planning your trips and also to take along with you to keep you on track. Not quite as detailed as a USGS topo but sufficient in many cases, especially if you're sticking to a trail.

These are very good ones. One thing I like best is that they're easy to carry and stand up well to repeated use. At this point I have 11, from RMNP to North Cascades. They really come in handy when your travels cover an area that would require several topos. Detail, as Sequoia pointed out, is lacking compared to the USGS topos.

I've recently found a few instances where trails seem to be missing from these maps. I wonder where National Geographic gets their info for these maps.

I own four of these maps for Colorado. They are correct on trail locations, and they cover a large area, so you only need one map for long hikes. I would definitely recommend these maps.

they sure aren't perfect but the topography, UTM overlay and other features make these maps great. Tear resistant and waterproof