the mission is called cut thoat business where you chase og loc in a hovercraft and then he changes into a go cart and you have to kill him and you can find on behind the hotel that has a boat in the big lake kind of ill give you a map look at the side of the map and look for the the vortex and see which number it is and look for it on the map http://img63.exs.cx/img63/143/cars1.jpg hoped that helped (if you have microsoft explorer you can zoom in)
my gang
,me,eedledeedle, Mr.Sparkle,matty dawkins,big smoke,oober,certified gangster,RICH95419, GT4 Maxie,luckyluke