Lac des Arcs Bunker Hike
A Simple Adventure for Semi-Retirement Life
There’s something special about stepping off the highway, following a short trail, and suddenly finding yourself inside what many hikers casually call the bunker. It’s a concrete tunnel carved into the side of Mount McGillivray, overlooking Lac des Arcs – or more prominently the Bow River. It’s one of those quirky, unexpected destinations that make the Bow Valley so fun to explore.
<== This is a stock photo of the bunker
Randy and I wandered up here from the Lac Des Arcs exit off Highway 1, just a few minutes from Canmore. The trail isn’t long or technical.
It’s simply a steady walk that rewards you with sweeping views of the valley and a dramatic, cave‑like opening that frames the mountains beautifully.
For anyone living a semi‑retired life or easing into one, little treks like this are gold. They don’t require big planning, big budgets, or big athleticism. Just a willingness to lace up your shoes, step outside, and let curiosity lead the way.
The Real History of “The Bunker”
Although most hikers know it as the bunker, its real name is the Heart Creek Bunker or Rocky Mountain Vaults & Archives. And its backstory is straight out of the Cold War.
In the late 1960s, a private company called Rocky Mountain Vaults & Archives Ltd. began blasting a tunnel deep into Mount McGillivray.
Their goal? To build one of the world’s most secure underground storage facilities…a vault designed to protect vital documents in the event of nuclear war or other catastrophic events.
The plan was ambitious. Promotional materials at the time promised a facility that was fireproof, floodproof, rodent‑proof, and even bombproof. The company envisioned a network of chambers with reinforced concrete doors, fresh air systems, private vaults, and 24‑hour security.
Out through the In Door
But despite the futuristic vision, the project never reached completion. Moisture issues, financial challenges, and the failure to secure major clients including the Royal Bank of Canada ultimately brought the venture to a halt. By the early 1970s, the site was abandoned.
Today, the Heart Creek Bunker stands as a fascinating relic of Cold War anxiety…part cave, part industrial artifact, part graffiti gallery.
Nature has reclaimed much of it, but the structure remains intact enough to explore safely with a flashlight and a sense of adventure.
Why These Mini‑Adventures Matter
Semi‑retirement isn’t about slowing down. It’s about choosing what to speed up: connection, movement, exploration, and the small joys that get buried during the busy decades.
A short hike like the Lac des Arcs bunker gives you:
- A sense of accomplishment without needing to train for anything
- Fresh air and movement that feel good at any age
- A shared experience if you bring a partner or friend
- A reminder that adventure doesn’t require a passport
- A spark of creativity — perfect for photos, journaling, or simply feeling alive
These are the moments that shape a fulfilling semi‑retired lifestyle. Not the grand gestures, but the small, repeatable ones.
On our return hike – this is Randy in his typical squat position. At age 65 I can still sit cross legged – but this type of squat – I can not do for a prolonged period!
And here are a few more snaps from our return trek…in this first one you can see Highway 1 – the Trans Canada Highway heading back east.
And this one looks off to the north west and down onto Lac Des Arcs.
Nice day, eh! Here it is – early February with hardly any snow visible on the mountains. It is quite a different winter compared to the mega snow and cold they have down east.
What to Expect on the Trail
- Trailhead: From the Lac des Arc exit, park safely and follow the path heading west from an off-shoot parking lot heading uphill.
- Difficulty: Easy to moderate, depending on pace.
- Time Required: 1-2 hours round‑trip.
- Highlights: Mountain views, the Cold War‑era bunker, and a great lookout point for photos.
Bring water, good shoes, and a flashlight if you want to explore the interior.
A Gentle Nudge to Get Out There
If you’re building a semi‑retired life filled with purpose and freedom, start with small adventures like this. They reconnect you with the world, with your body, and with the people you care about.
And they remind you that the perfect time to explore – even close to home is now.
Let me know in the comments about any short adventures that you’ve taken like this.