LVH to Rivera blvd to the strip to the Wynn is about 1.2 miles. Walking a mile in the Vegas heat isnt that bad if you've done it before so you know what to expect or if you do it in the morning or evening. But in the middle of the day, if the temp is over 100, which it probably will be. Dont forget you will also get reflected heat from the sidewalks and asphalt so it will feel more like 120. Like the warning always say, the elderly, children and people with breathing conditions probably shouldn't do it, don't forget to take some water.