Petrified Tree
Petrified tree trunk with cracked, layered bark stands near a metal railing in Yellowstone National Park.
Signboard at Yellowstone National Park describing the Petrified Tree, featuring a large image of fallen petrified wood under a blue sky.
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Petrified Tree

Natural Attr★★★★☆
Last Updated: January 2026

Overview

About This Attraction

A lone petrified tree stands behind a protective fence, its once-wooden form now stone. Silica-rich groundwater replaced the organic wood over time, a process called permineralization that occurred after volcanic lahars buried the forest 50–55 million years ago. Yellowstone houses one of the largest, best-preserved petrified forests, offering a tangible record of past climates and ecosystems. The scene is a direct glimpse into Deep Time, carved by volcanic activity and forest regrowth.

Best Time to Visit

Summer and Fall (June–September/October) after snowmelt; morning light minimizes glare and crowds peak in mid-summer.

Visitor Tips

  • Park early or expect limited parking during peak season.
  • The short path is easy, but a slight incline may appear.
  • Use interpretive signs to read the petrified wood’s mineral replacement.
  • For broader petrified-forest exploring, consider Specimen Ridge hikes with proper gear and bear spray.
ℹ️ Data Sources

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