A night of illegal street racing throughout southern Orange County led to the arrest of three people, police say. Upward of 100 cars began gathering about 9:35 p.m. Feb 5, when Mission Viejo deputies responded to reports of a large number of vehicles driving recklessly and congregating in a parking lot near the intersection of Avery and Marguerite, said Orange County Sheriff’s Department spokesperson Sgt. Dennis Breckner. Police monitored the activity, and the vehicles left within 20 minutes, he said. About 90 minutes later, at 11:07 p.m., San Juan Capistrano deputies responded to reports of a large number of vehicles blocking the intersection of Camino Capistrano and Junipero Serra. When deputies arrived, the vehicles left. Similar reports were made to Dana Point police Feb. 6 at 12:02 a.m., and deputies again observed a large number of vehicles, this time near Dana Point Harbor Drive and Island Way. Deputies followed the vehicles until …