Why are Banff's lakes so blue?

Glaciers grind rock into a fine powder called rock flour. Meltwater carries it into the lakes, where the tiny particles scatter blue and green light.

Is Banff Canada's first national park?

Yes. It began in 1885 as a reserve around the hot springs on Sulphur Mountain and was later enlarged into the national park.

How do you get to Moraine Lake?

Moraine Lake Road has been closed to personal vehicles since 2023. Visitors reach the lake by Parks Canada shuttle, commercial bus, bicycle or on foot.

When is larch season in Banff?

Usually from mid to late September, when subalpine larches near the tree line turn gold before dropping their needles. Exact timing varies with the weather.

Can I explore Banff National Park in the app?

Yes. You can stand on the shore of Moraine Lake in the Valley of the Ten Peaks and explore the lake, forests and mountains in interactive 3D.

Turquoise glacial lakes beneath the limestone and quartzite peaks of the Canadian Rockies

Banff National Park

3D landscape · Moraine Lake, Alberta, Canada

Land here and explore →

Banff National Park covers about 6,600 square kilometres of the Rocky Mountains in western Alberta, along the Continental Divide. It contains the towns of Banff and Lake Louise, hundreds of glaciers, and some of the most photographed lakes on Earth. In this app you can stand on the shore of Moraine Lake, in the Valley of the Ten Peaks, and explore it in interactive 3D: brilliant blue-green water, a rubble ridge at the lake's outlet, dark spruce and fir forest, and a wall of steep, snow-streaked peaks.

Banff began in 1885 as a small reserve around hot springs on the slopes of Sulphur Mountain, making it the first national park in Canada. Today it is managed by Parks Canada and forms part of the Canadian Rocky Mountain Parks World Heritage Site, inscribed by UNESCO in 1984. It welcomes millions of visitors a year, and balancing people and wildlife is one of its biggest challenges.

Key facts

Location: Alberta, CanadaIn the Rocky Mountains, along the border with British Columbia
Established: 1885As a hot-springs reserve; Canada's first national park
Area: About 6,600 km²Parks Canada gives 6,641 km²
Model setting: Moraine LakeIn the Valley of the Ten Peaks, near Lake Louise
Lake colour: TurquoiseCaused by fine rock flour from glaciers
Rocks: Mainly sedimentaryLimestone, dolomite, shale and quartzite from ancient seas
Mountain building: Roughly 80–55 million years agoMain phase of folding and thrusting of the Rockies
Wildlife crossings: Overpasses and underpassesAlong the Trans-Canada Highway through the park
World Heritage: 1984Part of the Canadian Rocky Mountain Parks

Canada's first national park

In 1883, railway workers building the Canadian Pacific Railway came across hot springs in a cave on Sulphur Mountain, a place long known to Indigenous peoples. Disputes over who owned the springs led the Canadian government to set aside a small reserve around them in 1885. Two years later it was enlarged and named Rocky Mountains Park, and it later became Banff National Park.

The railway company built grand hotels, including the Banff Springs Hotel, to attract wealthy tourists, and the park quickly became a famous destination. The Cave and Basin, where the springs were found, is now a national historic site. The land of the park lies within the traditional territories of several First Nations, including the Stoney Nakoda, Blackfoot and Tsuut'ina peoples, and Parks Canada works with Indigenous communities on its management.

How the Rockies formed

Most of the rock in Banff's mountains formed as layers of sediment on the floors of ancient seas, along the western edge of the old North American continent, over hundreds of millions of years. These sediments hardened into limestone, dolomite, shale, sandstone and quartzite. Many of the peaks around Moraine Lake are built from hard Cambrian quartzites and limestones, roughly 500 million years old or more.

From roughly 80 to 55 million years ago, the final stage of a long period of mountain building, pressure from the west pushed these layers eastwards. The rock broke into great slabs that slid over one another along thrust faults, stacking older rock on top of younger and piling it into ridges. In Banff, many mountains have a steep cliff on one side and a gentler slope on the other, following the tilted layers. Ice Age glaciers later carved the peaks into horns and the valleys into deep U-shapes, and the park's remaining glaciers are still shaping the land.

Why the lakes are turquoise

Glaciers grind the rock beneath them into an extremely fine powder called rock flour. In summer, meltwater carries this powder into lakes such as Moraine Lake and Lake Louise. The particles are so small that they stay suspended in the water, where they scatter blue and green light, giving the lakes their intense colour.

The colour changes through the season. Moraine Lake is usually frozen until around early June, and it is often at its most vivid in July and August, when glacial melt and rock flour are at their peak. As melt slows in autumn, the colour becomes less intense.

Not quite a moraine

Moraine Lake was named by the explorer Walter Wilcox, who thought the pile of boulders damming its outlet had been left by a glacier. Many geologists now think much of the pile came from rockfalls off the nearby Tower of Babel, though glacial debris may also be involved.

The Valley of the Ten Peaks

Moraine Lake lies at about 1,885 metres in the Valley of the Ten Peaks, beneath a line of mountains sometimes called the Wenkchemna Peaks, from a Stoney Nakoda word for ten. Several of the peaks rise to more than 3,000 metres, and small glaciers cling to their north-facing slopes. A view of the lake and the peaks appeared on the back of Canada's twenty-dollar note in the 1970s.

The lake is reached by a winding road from Lake Louise. Because of traffic and crowding, Moraine Lake Road has been closed to personal vehicles since 2023, and visitors arrive by Parks Canada shuttle, commercial bus, bicycle or on foot. Trails lead from the lake to Larch Valley, Sentinel Pass and the Consolation Lakes.

Forests and larch madness

Banff's forests change with elevation. In the lower valleys, lodgepole pine, Douglas fir, white spruce and aspen are common. Lodgepole pines are well adapted to fire: many of their cones are sealed with resin and open to release seeds after a fire. Higher up, in the subalpine zone, Engelmann spruce and subalpine fir dominate, growing in dense, dark stands until trees shrink and thin out near the tree line, at roughly 2,200 to 2,400 metres.

Near the tree line grows the subalpine larch, a conifer that drops its needles every autumn. In mid to late September the larches turn gold, and so many people hike to see them that the season is nicknamed larch madness. Larch Valley, reached by a trail from Moraine Lake, is one of the best-known places to see them.

Wildlife and crossings

Banff is home to elk, mule and white-tailed deer, moose, bighorn sheep and mountain goats, as well as wolves, cougars, coyotes and wolverines. Both grizzly bears and black bears live in the park, and bear activity can lead Parks Canada to restrict access to some trails, including around Moraine Lake, where hikers may be required to travel in tight groups. Visitors are advised to carry bear spray and never to feed or approach wildlife.

The Trans-Canada Highway runs through the park, and collisions with vehicles were once a major cause of death for large animals. Since the 1980s, the highway has been fenced and fitted with dozens of wildlife crossings, including several large overpasses planted with vegetation and many underpasses. Long-term studies have shown that animals from bears and wolves to elk and deer use them, and the project has become a model for road ecology around the world.

Surprising facts about Banff National Park

Banff National Park began in 1885 as a small reserve around hot springs discovered by railway workers.
Moraine Lake's famous dam of boulders may come mainly from rockfalls rather than a glacier.
The turquoise colour of the lakes comes from rock flour ground up by glaciers.
Subalpine larches are conifers that turn gold and drop their needles every autumn.
Grizzly bears, wolves and elk use bridges built for them over the Trans-Canada Highway.
A view of Moraine Lake and the Ten Peaks once appeared on Canada's twenty-dollar note.

Frequently asked questions

Why are Banff's lakes so blue?: Glaciers grind rock into a fine powder called rock flour. Meltwater carries it into the lakes, where the tiny particles scatter blue and green light.
Is Banff Canada's first national park?: Yes. It began in 1885 as a reserve around the hot springs on Sulphur Mountain and was later enlarged into the national park.
How do you get to Moraine Lake?: Moraine Lake Road has been closed to personal vehicles since 2023. Visitors reach the lake by Parks Canada shuttle, commercial bus, bicycle or on foot.
When is larch season in Banff?: Usually from mid to late September, when subalpine larches near the tree line turn gold before dropping their needles. Exact timing varies with the weather.
Can I explore Banff National Park in the app?: Yes. You can stand on the shore of Moraine Lake in the Valley of the Ten Peaks and explore the lake, forests and mountains in interactive 3D.

Keep exploring

The landscapes in Ember’s Universe are procedural 3D scenes modelled on real places. The landforms, plants and light follow the real thing, but the details are generated, not mapped.

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