If you are looking for an excuse to ride Del Puerto, and Diablo Grande should you choose the metric, there is an organized ride on June 20th - the Canyon Classic, that starts in Patterson. The ride doesn't get as many riders as it should, the folks putting in on do a great job of organizing it. I've done it the last 2 years. The first time the wind kicked my butt, the second time was the hottest day of the year. My garmin read 108 coming back down the canyon.