There are many (probably at least 10) deep pot holes on 18th street between Valencia and Folsom Streets. This is part of my bike route to and from work every day, and even though I know they're there, I often have a hard time avoiding them while avoiding traffic and parking cars/car doors. Cyclists who are unaware of the pot holes could easily be knocked over into traffic by them! The are mostly on the right side if you're heading from Valencia towards Folsom. I can take and upload some photos if needed!