Grizzly Peak century? practice rides?

May 1st is the Grizzly Peak Century. Here’s my map of the 109-mile route (drawn quickly based on their map, may not be 100% turn-for-turn correct). I’m thinking about doing it.

For now, here are two 53-mile BART-to-BART rides I’ve sketched out that together cover most of the route (North ride, South ride). I plan to ride them some time in the next month and a half (as practice, and because they look like interesting rides– I’m not a biking-as-outdoor-spinning-just-for-the-sake-of-exercise guy)– anyone else interested?