The Las Vegas St. Patrick's Day Run is one you don't want to miss! Join hundreds of families and runs along the Historic Railroad Trail through Lake Mead Recreation Area. Runners pass through the Six Tunnels to Hoover Dam—a landmark that’s historic and beautiful. Choose your distance, from half marathon, 12K, 5K, or 1-mile. Every distance showcases views of Lake Mead, one of the largest man-made lakes in the world.