I really enjoyed the railroad tunnel trail. It's something different from the typical type of things you do in Vegas. The five tunnels were interesting and provided nice shade. Most people you passed were friendly and greeted you. The path was mainly flat, and even when there was a slight incline, I couldn't tell the difference. The parking lot is tiny, but we got there early enough and were fine. This is a type of trail that I can see myself doing periodically when the weather is not so hot. According to my walking app, I burned 600 calories for almost 7.5 miles, and my legs were definitely worn out by the end.