The fireworks at the Marin County Fair have a hight limit of 80 feet because of the nearby fire danger. They want to make sure that none of the embers fall outside the lake. As a result there are very few good viewing locations outside the fair iself. I spent quite a bit of time touring local hilltops before I found this one which provides a unobstructed view. Sadly, this view point puts the gas station on North San Pedro Road directly behind the show.