Some say the Flank Trail in Whistler, British Columbia, Canada is one of the most beautiful scenic mountain bike rides in the Whistler Valley. The 45 km biking route is filled with ups and downs traveling along a hard-packed earthy single-track trail with wicked downhill sections, some switchbacks and some climbs offering up some spectacular views of the Whistler and Blackcomb Mountains.
The trail is considered challenging because of the distance and the difficulty of some of the sections of the mountain biking trail. Most of the mountain bike trail is single track riding with some sections of technical riding crossing over exposed tree roots and loose rocks.
The one-way route follows the slopes of Sprout Mountain from Alexander Falls in the Callaghan Valley to 16 Mile Creek Trailhead on Cougar Mountain Road. There are other access points to the trail throughout the valley. One of the most used access routes are the two trailheads mentioned above and the Rainbow Trail.
The trail highlights the valley between Rainbow and Sproat Mountains and should take 5 to 6 hours to complete on a mountain bike. The highest point of the trail is near 16 Mile Creek reaching an elevation of 1500 metres. From the creek trailhead the route leads to Alpine Meadows via following 19 Mile Creek. Continue along the trail to 21 Mile Creek before reaching Function Junction and Alexander Falls.