I stayed until about 12:00. What were you riding? The weather was not optimum to put it nicely. Impressive diversity of bikes & riders. Kinda hoped the course would have gone up & down the bluffs at the West end of the park, but I can imagine laying out a course in a public park has it's challenges.
I'll definitely be spectating at the Irvine event.
I was on a white specialized 29er and I think my race was 11:30 to noon. The weather seemed utterly fantastic to me. The west side of the course was a bit mountain bike-ish...very fun, although I would have liked more hills too. Climbs aren't really a cx thing it seems.
I have no idea how I placed. I start towards the back and just pass throughout the race watching how others take their lines. I ate it on a tight single track corner in the dust and have some nice bruises today. Maybe I worked up to mid-field.