Glacier National Park

Listen for a moment. Somewhere nearby, water is moving. It might be a creek running over smooth stones, or a thin waterfall dropping off a cliff face. In this park, the sound of meltwater is almost everywhere. The air smells of fir needles and cold rock. If you are near Lake McDonald, look down through the clear water at the pebbles below. They come in red, green, maroon and blue, like a box of sweets spilled across the lakebed.

Those coloured stones are your first surprise. They are not painted, and they are not polished by human hands. The reds and the greens come from iron inside the rock. Where the iron met oxygen long ago, the stone turned red. Where it stayed sealed away from oxygen, the stone stayed green. The same mineral gives two very different colours. Each pebble is a small record of the air it once touched.

And these rocks are old. Very old. Much of the stone here formed from layers of mud and sand that settled more than a billion years ago, long before any animal walked on land. Geologists call these layers the Belt rocks. Some of them still hold ripple marks from ancient shallow water. Others hold fossils of stromatolites — mats of simple, single-celled life. Those mats are among the oldest kinds of life on Earth.

Here is the second surprise, and it surprises geologists too. Normally, younger rock sits on top of older rock, like pages stacked in a pile. But here, the order is upside down. Huge forces pushed a vast slab of ancient rock up and over much younger layers. This movement is known as the Lewis Overthrust. So when you look up at these peaks, you are often looking at old stone that was shoved on top of newer stone.

Then came the ice. Over many ice ages, great glaciers filled these valleys and carved them into deep U shapes. The ice sharpened the ridges into thin walls and left bowl-shaped basins high on the mountains. Many of the lakes you see today sit in hollows the ice scraped out. The landscape is, in a real sense, the shape the glaciers left behind when they melted.

That history gives the park its name. But the glaciers you can see today are small remnants, not the giants that shaped these valleys. Scientists estimate that around 150 glaciers existed here in the mid-nineteenth century. Today, only a few dozen remain large enough to count as active glaciers. Researchers have photographed the same views across many decades. In those paired images, the ice clearly shrinks, and bare rock replaces it.

Long before it was a park, this was home. The Blackfeet people live on the eastern side, where the mountains meet the open plains. Their reservation still borders the park today. The Salish, Kootenai and Pend d'Oreille peoples have deep ties to the western valleys. For these nations, the peaks, lakes and animals are part of living tradition and ceremony. Many places here carry names in their languages, as well as names given later by settlers.

In the late nineteenth century, a naturalist and writer named George Bird Grinnell spent time in these mountains. He called the region the Crown of the Continent, and he pushed hard for its protection. In 1910, Congress made it a national park. Soon after, the Great Northern Railway saw an opportunity. The railway built large lodges and smaller chalets in a Swiss style. It promoted the park to travellers with the slogan See America First.

If you see a bright red vintage bus with a rolled-back canvas roof, that is part of the same story. These touring buses have carried visitors through the park since the 1930s. People nicknamed them Jammers, after the grinding sound drivers made when they shifted gears on the steep grades. The fleet has been restored over the years, but the shape and the colour have stayed the same.

The road those buses travel is a story of its own. The Going-to-the-Sun Road was finished in 1932, after years of difficult work. It climbs along cliff walls and crosses the Continental Divide at Logan Pass. Builders shaped the stone walls and arches to fit into the mountainside, not to stand out from it. Snow buries the high sections every winter, and crews spend months clearing it each spring.

The Continental Divide matters here in a special way. On one peak in the park, called Triple Divide Peak, rain can split three ways. Some water runs toward the Pacific Ocean. Some runs toward the Gulf of Mexico and the Atlantic. And some runs north toward Hudson Bay in Canada. Very few places in North America send water to three separate seas from one summit.

The border with Canada is close, and the two countries share this landscape. In 1932, Glacier joined with Waterton Lakes National Park in Alberta to form the world's first International Peace Park. Later, the joint parks became a UNESCO World Heritage Site. The mountains do not stop at the border, and neither do the animals. Grizzly bears, mountain goats, bighorn sheep and elk move freely across both sides.

That wildlife is real, and it deserves respect. Mountain goats often appear near Logan Pass, white against grey rock. Bighorn sheep graze the meadows. Bears forage for berries and roots, especially in late summer. Keep a safe distance, carry bear spray on trails, and never feed any animal. A quiet, watchful visitor often sees far more than a loud one.

Now, before you move on, look around once more. Notice the colour of the water. Close to the glaciers, some lakes turn a milky turquoise, because fine rock flour from the ice hangs in the water. Feel the temperature of the air, and how quickly it changes when a cloud passes. Every stone, slope and lake around you carries the marks of ice, time and the people who have loved this place. Walk slowly. Let it stay with you.