Walking the Debris: A Hike Through Canada’s Deadliest Rockslide

 

 

On April 29, 1903, Turtle Mountain—long known by Indigenous people as “The Mountain That Moves”—unleashed one of the most catastrophic natural disasters in Canadian history. In roughly 100 seconds, approximately 82 million tonnes of limestone tore free and roared down into the Crowsnest Pass, permanently reshaping the landscape and burying part of the town of Frank, Alberta.

More than a century later, that vast boulder field remains. The Frank Slide Interpretive Centre sits at the edge of it, and just outside the doors begins a 1.5-kilometre self-guided interpretive trail that winds directly through the debris.

In our latest video we follow that trail with the official brochure in hand. We pause at the historical markers, look closely at the geology that made Turtle Mountain so unstable, and notice how nature is slowly, steadily reclaiming the rugged terrain. House-sized blocks of limestone still dominate the scene, yet patches of grass, wildflowers, and determined trees are pushing through the cracks.

A secondary camera mounted on a backpack offers a different perspective—one that shows just how small a person feels while picking a path between those massive rocks. It is equal parts humbling and fascinating.

This is the second video in our exploration of the Frank Slide. Where the first focused on the broader story of the disaster, this one puts boots on the ground and lets the landscape speak for itself.

If you enjoy authentic regional history, dramatic Canadian scenery, and the chance to walk through a place where geology and human history collided with devastating force, the trail is well worth the visit—and the video is a solid preview of what awaits.

Watch “Walking the Debris: Hiking Through Canada’s Deadliest Landslide” on the KassDays YouTube channel.

Walking the Frank Slide with KassDays

 

 

Kass is back on the move — this time across the boulder-strewn landscape of the Frank Slide, Canada’s deadliest rockslide.

At 4:10 a.m. on April 29, 1903, roughly 110 million tonnes of limestone tore free from Turtle Mountain in Alberta’s Crowsnest Pass. In about 90–100 seconds the rock raced across the valley, burying the eastern edge of the town of Frank, two kilometres of railway, and the coal mine works. Between 70 and more than 90 people lost their lives; most still lie beneath the debris.

The mountain’s unstable folded geology was the main culprit, with coal mining and freeze-thaw weather adding the final push. Local Indigenous peoples had long called it “the mountain that moves.”

Today the massive scar and the chaotic field of grey rocks remain a powerful sight. In the new video Kass walks right through it, sharing the story while standing among the same boulders that fell more than a century ago.

The full episode is on the KassDays YouTube channel. Come walk the rocks with us.