This study presents a paleoenvironmental and palaeontological analysis of the new upper Barremian-lower Aptian dinosaur tracksite at Las Pe & ntilde;as Amarillas (Enciso, La Rioja, Spain). We described and sampled the stratigraphic section yielding the footprints for microfacies analysis. The tracks were identified, photographed, catalogued, and measured. Facies and microfacies data suggest deposition in the eulittoral zone of a shallow carbonate lake, subject to periodic terrigenous input from the avulsion belt of a large adjoining alluvial plain. The stratigraphic succession exhibits a shallowingupward trend. A total of 26 footprints, comprising five trackways and two partial trackways, were identified, along with seven vague traces of uncertain affinity. The footprints range from 12 to 67 cm in length and are primarily attributed to ornithopod dinosaurs. Although traces referable to the nomen dubium "Hadrosaurichnoides igeensis" are present, we provide evidence further challenging the validity of this ichnotaxon. Finally, walking and trotting speeds were calculated, and signs of gregarious behaviour were inferred for some of the trackmakers.
