Visiting my sister, but she'll be at work for about half the time I'm there. Anyone wanna go for a ride and let me borrow a bike? Any cool places I shouldn't miss? I'm super psyched; I hear it's awesome out there.

lol...where are you from?

hmmm

hang out near the ferry building and practice trackstands and wheelies

Do your own adventure, go everywhere you can. The traffic is tough, the hills, the track crossings, the trollies and the people make the city one of the gnarliest/ best riding destinations on the planet. Hit the Wharf and EMB areas for some flatter stuff, the Mission is next up the scale, then North Beach and the Haight. You're gonna walk the hills and be scared $hitless on the down hills. It's all what makes it THE riding city of cities IMHO! I don't run brakes usually, but run both in that city. Good Luck.

download this map. it has elevations, bike routs, etc...

https://www.sfbike.org/download/map.pdf

I'm from Indiana/Ohio, my sister moved out there a few months ago. I've never been to California before!

come to Vis Valley/Cow Palace area, no giant hills, no killer traffic, but its kinda ghetto.