They are usually ridden on paved roads with steep downhill grades, corners and switchbacks. It is steep and rugged with over 200 steps carved into rock and several switchbacks. Walter's Wiggles, a series of 21 steep switchbacks, are the last hurdle before Scout Lookout. The trail continues along 97 switchbacks to the Sierra crest about south of the summit. After some elevation gain via long switchbacks, the trail reaches the top of Nevada Falls. The 276-foot-long Snake Alley has five switchbacks in a 60-foot climb. Some entail narrow dirt roads with switchbacks and pull-outs. In trail building, an alternative to switchbacks is the stairway. This mile is immediately followed by the switchbacks up the side of the first hill. Riders entered a long indoor queue with several switchbacks. Vint's alignment reduced both switchbacks and the road's visual impact, at increased cost. Guests then navigate a multitude of queue switchbacks. The entrance to the underground fort lies at at the end of 29 switchbacks. After passing through the switchbacks, guests approach the loading station. Within the building, guests are directed through a series of queue switchbacks and pathways.