Columbian mammoth
On July 9, 2005, the fossilized bones of a juvenile Columbian mammoth were discovered by San Jose resident, Roger Castillo, in the Lower Guadalupe River near the Trimble Road overcrossing. Roger founded the Salmon and Steelhead Restoration Group conservation organization and has served as a Board member of the Guadalupe–Coyote Resource Conservation District. The Pleistocene mammoth was nicknamed "Lupe" by area residents and Lupe's fossils are exhibited at Children's Discovery Museum of San Jose.