Yep, Primavera goes UP the wall. I don't remember what the grade is, but it's really not that bad -- slow going but not impossible if you've got a triple. Palomares is tough too.

I'm doing the 100k, which has 4200 feet of climbing (according to the web site). It's a beautiful, scenic ride on roads with little traffic. When the weather's good, this is a great ride.