Petrified Forest

Calistoga's Petrified Forest is home to the world's largest petrified redwood trees, known as Sequoia langsdorfii. It's estimated the trees were petrified in a volcanic eruption that occurred 3.4 million years ago. (It's believed the crater of the volcano was located within a mile radius of Mt. Saint Helena.) The trees have essentially become fossils. Now mainly composed of quartz, the petrified trees are said to as hard as rocks or even steel. All of the petrified trees can be seen from the Main trail. It's just a half-mile in length. Docents lead 90-minute walks on the trail daily at 11am, 1pm, and 3pm. Self-guided walks are also an option.