From Las Vegas go north on Hyw. 95. Take Kyle Canyon Road to until cut-off to Lee Canyon Road. At top of pass is a trail, North Loop Trail. Hike this trail until highest point.
Best to do from late spring to late fall. Temperatures are between 20 and 30 degress less than Las Vegas.
This is a picture of some of the wonderfully old Bristlecone Pine trees in Nevada. Some are hundreds or thousands of years old. This walk is at approx. 9000'. Not far from here is a tree called "Rain Tree". It is one of the largest Bristlecone Pine trees in the area.