Akio- just mark a waypoint on your GPS. That coordinate is on the trail:

http://www.mapquest.com/maps/map.adp?latlongtype=decimal&latitude=40.2415&longitude=-121.7721
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4x4 in uppercase is $X$!!!
1997 R50: VG33E/RE4R01A/TX10/3.7/R200A/ARB/4.636/H233B/ARB/4.636/321150R15