Yea, but it's easy dirt that's well traveled and well maintained. Basically fire/mining roads in the hills around Dawson. Only one or two sections that might be considered technical (King Solomon's dome) and folks do it on street bikes every year. I've done it on both my '80s cruzers on street tires. Did it one year on the GL500 after a couple days of steady rain - that was a bit of a slog. Beautiful views and a fun half day of riding.