The false flats at the start act as a great warm up and once you hit the first hairpin you know you are in for a ride. It kicks up to a mile long climb averaging about a 8% grade. It then flattens out the rest of the climb until you make it to the last mile of the climb where the hill returns to an average grade of about 8% again. You will be rewarded with some great vistas on either side of the divide.
I recommend that you do this ride in the morning because the winds are more calm. A head wind can be brutal. The traffic is not bad and the lanes are plenty wide.
The best part about working your way to the top - the descent. Make sure you don't get a speeding ticket on the way down.