There are some odd things about Crystal Cave (right, Steve?) but a vertical access road is not one of them.
Google maps would have (another) gold mine if they ever got it right. Some algorithm probably interpolated this ridiculous route to Crystal Cave. GM does not show any trace of the actual route to the Cave, which intersects just above the toe of the foot-shaped bend in the road just to the north and a little east of the section shown in these maps, shown clearly (at the letter "K" in "PARK") on the USGS topo.
