A short list of Tijuana-based events for the weekend of July 11-12…
Go to a binational art and music festival on Saturday: An art and music festival will be held at the CECUT cultural center, which is easily reached from the border. For more information on the festival, refer to http://tijuanaprogresivo.wordpress.com/ and to find it on a map go to http://www.tagzania.com/pt/cecut/
Run a half-marathon on Sunday: Get more information at this Meetup group web page. Looks like you need to register before Saturday, but that may be flexible. http://www.meetup.com/SanDiegoRunning/boards/thread/7230114/