SurfNTurf wrote: And my buddy ripped the oil pan out of his Toyota Camry on the same road. C'est la vie.
In my younger, stupider days, I took my Mazda 3 to within spitting distance of the bathrooms. Now I'd rather just walk an extra 20 minutes and save my car the abuse. There's a great parking area close to the 2WD trailhead at a signed junction, and the road is relatively mellow to that point. It's at the 6.9-mile mark according to the TH directions on this site.
That's funny - I didn't realize they were over.
The signed trail junction would probably be a safe goal for a Prius to reach. I wouldn't recommend any sedan with less than 6 inches of clearance to try for anything more as the road becomes considerably rougher after this turnoff.