Woke up at 4:30AM to drive out here. Google Maps will take you to the beginning of the Fire Road, but you can park like 100 meters back and start the trail from there according to AllTrails. You can deduct 30 minutes from the Map Time to get there, so was a 2 hour drive from South Bay. Started the hike at 6:30AM, personally wouldn't start it any later, it gets hot. There were a few trail runners coming down while I was going up. Literally only saw one couple on the way down, I don't blame people for not wanting to do it given the weather. The views are quite nice, get a nice view of Napa Valley. Only downside is that it's quite exposed and almost no shade. Sixth peak done, but I'll probably just do the other 3, cause why not.