Follow the path in Dustwallow Marsh to the path that leads to the Barrens. Go into the Barrens and follow the path south, it will split about halfway through the country. You will then go to the elevators and take them down-Do not jump. Head west and go through Thousand Needles. You will follow the path west until you get to a big open area and you will then start heading south once you get to the racetrack. Along the mountains you will find the pathway that leads to Tanaris. The path ends at Gad. The Horde flight plan is next to the mountains on the left and the Alli flight plan is on the over side of the city.