You should consider the hare scramble race they're having at Hollister on Father's Day. I'm thinking about riding it myself. I've done a few of them and they're a lot of fun. They usually close the lower portion of the park to run the races, so if you're going to Hollister and not planning on riding the race on Father's Day, your trail options will be a little more limited than usual. The races are great. Usually about an 8 or 9 mile loop. You just ride as many loops as you can in the given amount of time. You can take it as seriously as you want, but I always have a great deal of fun, even though I get my butted kicked consistently.