You can also try out Argentine Pass. The upper road if fairly easy. The lower road has two pretty good water crossings as well as a stretch were you're actually driving in the river bed.
But the upper road will get you were you want to go. And it's a nice view.
It's just up out of Georgetown off the Guanella Pass Road.
2003 Tacoma TRD 4x4 4-Door
I would rather walk than drive anything that's 2WD. ©