The park where camping is available for the race is at Trailhead Park (at the start / finish). It is a city park and they only allow camping on the night(s) of the race (Thursday night and Friday night - there is no camping on Saturday night).
Thursday night (the night before the 50 & 100-milers start) is pretty quiet - although we do start setting up in the park at 5:00 AM or so on Friday. Race start is at 7:00.
Fair warning! On Friday night there's a lot of light, noise & activity in the park as it's also the finish area for the 50 & 100-milers. There are darker corners to go camp in, but I can't guarantee a good nights sleep.
The good news is, there is a restroom with flush toilets there!
The best way to get a camping spot is to come see the Race Director at the pre-race dinner on Thursday night. I will have the camping passes with me. They're $10.
The park only allows camping on the night(s) of the race and at no other time.