The day and evening tours are different lengths of time, distance and elevation. The Johnston Canyon Evening Icewalk is a 2.5 hour tour that visits the lower falls with 1.5 - 2 hours of walking 2.2 km with an elevation gain of 65 metres (213 feet) and includes a souvenir headlamp (yours to keep after the tour!) to light your way under the stars.The Johnston Canyon daytime tour is a 4 hour tour that includes both the lower and upper falls with 2 - 2.5 hours of walking and is a little more strenuous due to the increased distance (5.4km) and elevation gain of 135 metres (443 feet).