Mambrillas de Lara route
La Pedraja and Las Sereas sites
We are heading towards Mambrillas de Lara, where we find the La Pedraja site, one end of an extensive fossil track site that runs for five kilometers from Quintanilla de las Viñas. More than 1,000 tracks spread over 14 rock surfaces are preserved there. They are 144 million years old, dating from the transition from the Jurassic to Cretaceous period. They are the oldest dinosaur remains in Burgos province.
123 fossilized tracks by different kinds of dinosaurs have been recorded in a relatively small area in La Pedraja. Tracks were left by sauropods, theropods, and perhaps ornithopods. The most common are the sauropods, identifiable by the impressions left by their huge feet and hands. The statue at the site is a reconstruction of this kind of dinosaur.
From Mambrilla de Lara we head towards Quintanilla de las Viñas, where the pretty 7th- century Visigoth church is well worth seeing. We can find the Las Sereas site there, the other end of the five kilometer fossil track site we mentioned before.