I went backpacking in Inyo National Forrest - near Mt Whitney about 10 days ago and because of the high snowfall this past winter, there was tons of snow at the 10000ft+ elevations.
So I really needed an accurate map to find my way since the trails were in some cases not visable[for .5 mile or more]. Anyway, I found the map to in error by over 100 yards at times. Siberian pass was nowhere near what the map showed.
I should have loaded my usga quad map to my gps!