Did you know the official State Dinosaur was first discovered in Prince
George’s County? The 20-ton Astrodon Johnstoni lived between 130 million
and 95 million years ago. Teeth from the Astrodon Johnstoni were first
discovered in Prince George’s County in 1858. The recently opened Dinosaur
Park has been the site of numerous fossil finds representing millions of
years of Prince George’s County history from the Cretaceous Period (144-65
million years ago), when dinosaurs roamed the Earth, to the early Iron
Industry of Maryland (spanning the 1650s to the 1920s). Featuring
interpretive signs, evocative plantings, walkways, and public parking, the
Dinosaur Park is open to the public on the first and third Saturdays of
each month, from 12-4 pm. School and group programs by appointment.
Schedule may expand and additional programs to be announced.