Huge petrified redwoods and incredibly detailed fossils of ancient insects and plants reveal are found here. Almost 35 million years ago, enormous volcanic eruptions buried the then-lush valley and petrified the redwood trees that grew there. A lake formed in the valley and it became the final resting-place for many insects and plants. The visitor center, just 2 miles south of Florissant, offers a look at fossil collections and features hiking trails.
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