It is a decent ride. Mapmyride said it was about 6000 feet of climbing and 50 miles. I need to ride it with my garmin to determine what the actual climbing is.
I did that loop when I was first working on climbing and it kicked my rear. Unfortunately, I have not ridden it in a while. The last time was while I was recovering from my lovely pollen allergies and being hit by a car. It did not go so well. Too bad pwnt did not bring a tow rope.
The traffic sometimes goes a bit fast. No shoulders. However, the steep parts and switchbacks can keep the motorist traffic at a slower speed.