Here's the route (click for higher res):
It was challenging but not as hard as I thought it might be. The advantage of rolling hills, as opposed to long climbs, which I've done a few times now, is that though the elevation gain might be equivalent in the end, there's always a goal in sight and a rest for your legs. I was a big fan and I'll be back to these hills ASAP.
There's a long bike route through the southern part of the valley that I took advantage of, after which I followed Ventura Blvd. to the end and kept going on roads that paralleled the 101, up and down hills till I got to Chesebro Rd. I followed that up into Cheeseboro Canyon park.
There's a route out of the park that eventually meets up with Las Virgenes Canyon Rd., which gets back to the valley at the very end of Victory Blvd. From there I pretty much retraced my steps back through the valley all the way home.
It was such a nice day. The beauty of southern California never ceases to amaze me or fill me with a sense of adventure and longing for more. I was also surprised, as I've been many times here, at the volume of people found even in fairly remote areas. It's encouraging to see others enjoying this day and these hills as much as I did.