The Walking Dead Escape at Petco Park in San Diego, CA gives those who participate a chance to experience the thrill of a zombie apocalypse turned obstacle course as either a survivor, walker, or a spectator, watching the carnage unfold safely from the sidelines. The course is specifically designed for people with a wide range of abilities, including obstacles such as rope bridges and cargo nets, but includes an easy path if the challenges prove a bit too difficult; this path does increase of becoming walker chow, however. The event is pay-for-play ($80 a head) and runs from July 12-14. You can find out more details on the official website.
Thanks to Dev for the tip!