EMPLOYER: Mary-Ann
PREREQUISITES: MM #4 (Complications), Must be Michael.
REWARDS/UNLOCKS: Contact: Mary-Ann
COMPLETION REQS: 1. Contender: Win the race without using shortcuts.
Head over to the question mark in Del Perro to meet Mary-Ann, who is not in any way psychotic or crazy. Apparently this little meeting turns into a foot race, so get ready to run!
Follow the markers on the map. Near the start of the race the sidewalk will curve to the left and you'll need to take the right path to continue. Here you can cut over the grass and/or jump the fence to give yourself a considerable lead, but it will void out the "Contender" completion requirement if you take any short-cuts.
The rest of the race is fairly simple and linear, so keep following the markers and save some stamina at the end for a sprint to the finish line.