Our Green Tortoise South Park Loop Trip, Sept., 1998. Where: Lake Mead. Just prior to Las Vegas, this was a quick swimming stop. The panorama was a pleasant surprise. Click on photos to see full screen view. Lake Mead Frenzy. The drivers 'get us there', down a long dirt road, to a very secluded swimming spot. Lake Mead panorama. Last stop, Las Vegas! A happy group leaving Lake Mead area.