Together with some friends from the Taco Tuesday Social Ride (we bike to taco places around Irvine on Tuesdays; you're invited), I'm planning a bike trip from Irvine to San Diego for late September. I don't think any of us have gone that far (~90 miles) in a single day before, so we're doing some training now to get our mileage counts up.
Today, we did a ride down Santiago Canyon Road in the foothills to the east. At 46 miles with a 1/2 mile of climb in full sun, it was a pretty good trip!
For the curious or adventurous, you can find an overview map and a route card. We were hoping the Irvine part of the Peters Canyon Trail would be re-opened, but it was still closed east of Warner, so we detoured south to Harvard and continued until we met the trail past Walnut.