Landmark information
- Location: 
 4100 Petrified Forest Rd, 5 mi NW of Calistoga
- Plaque: 
 Official State Plaque
- Site: 
 Existing
- Date First Visited: 
 7/28/1995
- Date Most Recently Visited: 
 2/4/2009
- GPS Coordinates: 
 N 38 33.342, W 122 38.322
About this landmark
                Plaque text: 
				
				Petrified Forest
				
				The Petrified Forest, dating from the Eocene period, is the only known example of a petrified forest in California. Its size, scope and variety of petrification is unique in the world. Opalized wood, obsidian, quartz crystal, petrified coral and fossilized insects number among its wonders.
              
