Frenchman Mountain, aka Sunrise Mountain, is the tallest peak on the eastern border of the Las Vegas Valley, and is certainly the most intimidating. At 4,055' with two twin peaks (alas, no Log Lady) and a deceiving false summit that drops 260' into the main saddle only to ascend another 700' for the true summit (for a total of 2,000ft of elevation gain), Frenchman is strenuous for even experienced hikers. However, the steep 2.2-mile gravel trail is easy to follow and doesn't pose many other challenges besides being really steep (and rocky). You'll have great views of the Las Vegas Valley from the summit, and the hike can be done in a few hours with plenty of viewing time at the top. The descent can be rough on the knees, so trekking poles would come in handy for this one.