Mt. Bonnell, 3800 Mt. Bonnell Dr. (west of Mopac on 2222, left on Mt. Bonnell Rd.) The third-highest point in Austin city limits at 780 feet. Several trails make for pleasant short hikes and points to experience incredible views of Town Lake and the city. The area has a history of romance and is sometimes called Antoinette's Leap, after a woman who supposedly leapt to her death to escape Indians who killed her lover.