Barr Trail, named after its builder, Fred Barr was constructed from 1914 to 1921. The trail passes through three ecological life zones: Montane, Spruce-fir, and Alpine. Wildlife species common to those zones are frequently observed. Pikes Peak has been a landmark since before recorded history. It was named for Zebulon Pike who described the Peak in 1806 while exploring in the area to the south. The first recorded climb to the summit was in 1820 by Dr. Edwin James of the Stephen H. Long Expedition. At present, over 150,000 visitors per year are estimated to climb the peak on the Barr Trail.