The Rainbow Trail is a convenient and popular trail near Whistler Village that takes you to Rainbow Lake as well as the Flank Trail, Rainbow Falls, Hanging Lake, Madeley Lake, Beverley Lake, Rainbow Mountain... and even Whistler Olympic Park if you are determined. It is a consistently uphill and very beautiful trail with several water (bridge) crossings and waterfalls on the way to the picture-perfect lake.
Quiet trail compared to other Whistler trailsTrails continue past the lake to other lakesStunning views of Blackcomb & Whistler mountainsContinuing trail/route to Rainbow MountainThe alpine hiking options(eg: Sproatt) are incredibleThe huge erratics at the lake are perfect for suntanning
No camping, fishing or swimming allowedTrail is sometimes scenic, but often in deep forestTour companies often fly over spoiling the serenityDogs not allowed due to being Whistler's water source
Alexander Falls 
Ancient Cedars 
Black Tusk 
Blackcomb Mountain Brandywine Falls Brandywine Meadows Brew Lake Callaghan Lake Cheakamus Lake 
Cheakamus River 
Cirque Lake Flank Trail Garibaldi Lake Garibaldi Park Helm Creek Jane Lakes Joffre Lakes Keyhole Hot Springs Logger’s Lake Madeley Lake Meager Hot Springs Nairn Falls Newt Lake Panorama Ridge Parkhurst Ghost Town Rainbow Falls Rainbow Lake Ring Lake Russet Lake Sea to Sky Trail Skookumchuck Hot Springs Sloquet Hot Springs Sproatt East Sproatt West Taylor Meadows Train Wreck 
Wedgemount Lake Whistler Mountain
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There are a few views of the valley across to Whistler Mountain, Blackcomb Mountain, and Wedge Mountain. Few views, though fantastic. Rainbow Lake itself is in a gorgeous alpine valley with branching trails that extend further beyond the lake in at least three directions. Along with the waterfalls, bridge crossings and valley views, the Rainbow Trail passes through deep forest with some impressively huge trees. Plenty of birds can be heard and seen along the trail and though black bears frequent the area, they are infrequently spotted due to their migration down into the valley. Cougars are also known to roam around this area, though also rarely spotted. As recently as 2014 signs of cougar activity were identified on the Flank Trail near where it branches off from the Rainbow Trail. The Rainbow Trail has a small side trail that takes you to Rainbow Falls. Not far from the trailhead, the small Rainbow Falls sign is easily missed. It is located about five minutes into the Rainbow Trail and your best bet to find it is to keep bearing right along the first couple trail branches. Don't worry about getting lost here though as all the trails reconnect further along the trail when you briefly exit the forest at the water treatment building. Unfortunately, Rainbow Lake is the water supply for Whistler, so you cannot swim, fish or camp near the lake. There is decent camping available nearby at Hanging Lake as well as Beverley Lake in the direction of Rainbow Mountain.
Hanging Lake is a bit dark and swampy as compared to the spectacular camping at Beverley Lake which is a tough but rewarding hike beyond Rainbow Lake. See the trail maps below for the routes to each of these lakes. Beverley Lake is reached by following the trail toward Rainbow Mountain. About 40 minutes into this trail the trail markers will stop as it ascends up into an extensive boulder field towards Rainbow Mountain. To reach Beverley, bear left of the route to Rainbow Mountain and follow the valley. Beverley Lake is about an hours hike from Rainbow Lake. To get even further from the world, hike the partly marked trail to Beverley Lake. The first kilometre is well worn and easy to follow as this is also a somewhat popular trail to reach the summit of Rainbow Mountain. The Rainbow Mountain trail veers right and quickly ascends through massive boulders. If you instead bear left and stay in the valley you will reach this fantastically remote lake. You will be a bit disheartened, however, when you arrive at the lake and see a picnic table. It's very out of place, evidently put there by some helicopter tour company. Other than the weird picnic table there are no signs of humanity, and no restrictions on camping as you have at Rainbow Lake.
