Not to hijack or rudely interrupt ... I'd just like to add that I've found a terrific little two-track road, Silver Island Canyon Road, that winds through the northern tip of the Silver Island Mountains, beginning and ending on the main loop road. It's an awesome little cutoff that is not to be missed.
The northern terminus of this cutoff is right at Donner-Reed Pass, where the ill-fated Donner Party passed on their way to the Sierra.
You'll find it at: N40.94669 W113.76545 Perhaps it will be helpful to folks who get all inspired 'n stuff by this adventure.
Now I'll butt out ...