Street Races are where you race in the street you can get money for doing them. There are five all together. The first 4 races are with Cars. The last race is bikes only. Only Franklin can participate in Street Races. After the 5 of the Street races are done there are no more unlocked. Although Franklin can always just do the street races over and over again until 5am to earn more money.
-If you do Hao's first street race then his dialogue in the mission Father/Son changes. If you didn't do the first street race then it will be "Hey Franklin I need to get you out to one of the races". If you did do the first race then it will be "Hey Franklin I just thought you came here to talk smack about that race you won."
Related ThreadsTrevor and Franklin Street Race - last post by @ Oct 4, 2013
Casino Activities & Street Racing - last post by @ Sep 21, 2013
People approaching you on the street for missions - last post by @ Jul 16, 2012
Street car meet up - last post @ Apr 24, 2014
GTA Online Racing League (Megalodon Shark Card Prize) Streamed on twitch and uploaded to Youtube - last post by @ Aug 10, 2014