Why Do People Stack Rocks Along Colorado Trails?

Why do people stack rocks along Western Colorado trails? Here's what Colorado residents say via social media.

Yosemite asks visitors to stop building, knock over rock cairns – NBC Bay Area

Just a simple rock stacker. It's not much but it's honest work : r/pics

458 Man Made Cairns Images, Stock Photos, 3D objects, & Vectors

Please don't stack rocks on your next hike. Here's why. - Lonely Planet

Stop the rock-stacking — High Country News – Know the West

Why do people stack stones in the wild?

Stack Rock Trail. How did I get so lucky? I love hiking…, by Michelle Parsons

Local Report: Do Not Stack Rocks, It Will Break the Universe

Please don't stack rocks on your next hike. Here's why. - Lonely Planet

What is the Difference Between a Rock Stack and a Cairn on a Hiking Trail?

When is it OK to stack rocks on the trail? - Adirondack Explorer

What's the Deal With These Piles of Stacked Rocks in Maine?

Why you shouldn't stack rocks in the wild - The Washington Post