I'd call the ranger district and ask directly about the road.
The TI maps can be good, but sometimes the road conditions can change in as little as a a year (or less)
Generally speaking, a high clearance vehicle road is just fine for my old 2wd pickup..but not for a passenger car as it would bottom out. (Think hole the rock rd in Utah if you have been there)
However, my my old 2wd pick up would do terrible on a rutted, rocky road where more traction is needed..aka a 4wd road
Is the road you looking at a series of short dashes really close together..that means really rough, possibly steep and you need real 4wd with both 4low and 4high. May take a long time to drive and some off-roading skill too.
A series of long dashes? A rougher road, but doable for your AWD vehicle.
BUT CALL THE RANGER DISTRICT FIRST!!!!