Alamosaurus was a titanosaur that existed during the Late Cretaceous period in what is now Texas. It was named after Ojo Alamo, a formation in Texas, where it was first discovered. It was the last sauropod known from North America, and may well have been prey to Tyrannosaurus. It was one of the last Sauropods. The name Alamosaurus means "Lizard from the Alamo". It was about 56–70 feet long and weighed about 30 tons.
A skeleton of Alamosaurus once stood in the now destroyed Visitor Center in the original Jurassic Park. It, along with the neighboring Tyrannosaurus rex skeleton, was destroyed in the battle between the Tyrannosaurus rex, Rexy, and the Velociraptor pack, led by The Big One.