Mount Bonnell gives the best view of the city of Austin and the lake. It is also a part of the National Register of Historic places as of 2015. Mount Bonnell's highest point is 775 feet high. At this height, the hiking is beautiful and the view will definitely be worth it. A cave on Mount Bonnell was also home to the famous Texas Ranger, "Bigfoot Wallace", back in the 1840s. We recommend making it to the top in time for the beautiful sunsets! You (and your Instagram) can thank us later.