All the way to the left of the map there is a windy road that trails off of the map that's where you've got to go. That's where the dot is, to get to it without getting busted your best chance i've learned is to turn around as soon as u start the chase and head straight towards rosewood (that's the first city) when u get to highway 99 (that's the one that goes around in a loop) keep doing laps of the highway soon you'll get the call from mia and when you do you'll be on the right road just go around the highway until u reach a road on the right where the dot is and TADA!!
MONEY DOESN'T GROW ON TREES!...... Oh wait.....yeah.....it's.....made of paper.....