A very nice loop with a climb at the end! 98% good tarmac with a little rough stuff by the gorge. Just go slow there.
Other options on the Rainbow Road.
1. An out and back to ShuizhuKun Village.
2. Rainbow Gorge Return and
3. Rainbow Loop.
Rainbow Gorge Return
Rainbow Loop
A longer loop route. Can also add the gorge at the end of the rainbow road / north section if you want some extra KMs.