Cairns and blazes are both trail markers, used in different terrain. A cairn is a stack of stones used above treeline and on bare rock where there are no trees; a blaze is a painted mark or tag on a tree or rock, used in forest. Both guide hikers along a route.
| Aspect | Cairn | Blaze |
|---|---|---|
| What it is | A stack of stones | A painted mark or tag |
| Used where | Above treeline, bare rock | Forested trails |
| Made by | Land managers (don't build rogue) | Trail crews |
| Meaning | Marks the route | Colors denote trails; double = turn |
| Needs trees | No | Yes (or posts/rocks) |
You'll follow cairns when…
- You're above treeline
- You're on bare rock with no trees
- You're in the alpine zone
You'll follow blazes when…
- You're hiking in forest
- Trees or posts can be marked
- You're on a blazed trail system
Verdict
Frequently asked questions
What's the difference between a cairn and a blaze?
A cairn is a deliberate stack of stones marking a route where there are no trees — above treeline or on bare rock; a blaze is a painted mark or tag on a tree, post, or rock, used in forest. Both show hikers where the trail goes.
Why use cairns instead of blazes?
Above treeline and on open rock there are no trees to paint, and a worn path may be invisible on stone, so stacked-stone cairns are the practical way to mark a route. Below treeline, blazes on trees work better.
Should you build your own cairns?
Generally no — rogue cairns can lead other hikers off the real route and clutter the landscape, and dismantling natural rock harms habitat. Follow official cairns; don't create or topple them.
Related: Cairn · Blaze · Treeline · Double blaze