Hundreds of teenagers turned out for an unsanctioned rave party over the weekend in a canyon underneath the 805 freeway bridges in Sorrento Valley. Such events are advertised on social media as “underground” raves. Two of the dance parties have popped up in San Diego in as many weeks. Saturday night’s rave included a DJ, a light show, and a full stage, apparently powered by a generator. It lasted into the early morning hours of Sunday on Caltrans property underneath the freeway bridges off Carroll Canyon Rd. The location has no access to vehicles. By 12:30 a.m. San Diego police showed but there was nothing they could do because of the remote location along train tracks in the Carroll Canyon creek bed. Officers told dispatchers they were leaving the scene. MORE: https://www.cbs8.com/article/news/local/underground-raves-popping-up-beneath-freeway-bridges/509-49c13dc5-7269-4688-a21d-3e9ef1218f19