The way points of this bicycle route:
I'd recommend you take the loop counter-clockwise. You don't want to be going downhill on FR 237 northbound - you'll have a very hard stop at highway D.
First of the tough hills - this one is long
Caution - can be heavy traffic on 125
Watch for dogs along FR 150
Very scenic through here
Don't get going too fast here - sharp turn over creek
A short but tough climb
For me this is a very steep moderately long climb - some call this "Black Dog Hill." I have seen a few dogs on it.
15% grade in the middle
Expensive properties along FR 237
Make sure your brakes age good - sharp rigth hand corner at the bottom