The study on the biological richness of the “El Mineral de Nuestra Señora de la Candelaria” reserve in Sinaloa reveals its outstanding diversity of amphibians and reptiles, as well as the importance of their conservation. Over the years, this reserve, located in Cosalá, has served as a refuge for numerous endemic and protected species, facing challenges such as poaching, habitat degradation, forest fires and complex social problems. Despite these challenges, conservation actions such as environmental education and surveillance have helped mitigate negative impacts. This study highlights the prevailing need to preserve these unique ecosystems to maintain ecological balance, protect the diversity of herpetofauna in the Sierra Madre Occidental and enjoy its ecosystem services, providing a solid foundation for future long-term ecological management and conservation strategies.