I just did a 200 mile ride yesterday morning. I'd never been up to the top of Mt. Ord, a 7100 foot member of the Mazatzal range, so I decided to remedy that during the ride. It wasn't a terrible little two-track gravel road up there, but there were some steep spots, some scree to look out for, and some baby-head rocks in the road that could cause problems for your oil pan if you weren't paying attention.
Once I arrived up-top, I noticed two motorcycle campers parked among the juniper and pine forest along the road. One was on a Yamaha XT250, and the other was on a Royal Enfield Classic 350. I was kind of surprised to see a riding duo consisting of those two bikes; Mt. Ord is only accessible off Hwy 87 and it's a steep highway that gets 70+mph traffic despite the desert heat and the steep grades. Underpowered bikes stay away from this road, and neither of these bikes can be considered highway regulars.
Props to the RE rider though for getting his machine up there.