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.

Why Stacking Rocks in Nature is Harmful at Illinois State Parks

Short but Sweet-Quarry Pass Trail - Wilderness Walks

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

Balancing Act: The History of Rock Cairns and Why Stacking Rocks is Discouraged in Zion

Experts warn tourists to avoid 'rock stacking' especially in national parks - Mirror Online

Leaving No Trace: Rock Stacking

What is it with all the Stacked Rocks? – Julie Powell – Photographer & Graphic Artist

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

Don't Move Rocks! Friends of the Smokies

What are Rock Cairns & Why You Shouldn't Build Them – Bearfoot Theory