While climbing up to Pico del Fraile when visiting Nevado de Toluca (also known as Xinantécatl), the idea of running from the heart of Toluca all the way to the peak came to me. Nevado de Toluca is the fourth highest formation in Mexico and reaches up to 15,387ft / 4645 m. It seems to be a very popular place for bicyclists to ride up to from Toluca. I also saw a handful of runners at the entrance and even witnessed a 50k race at the bottom of the volcano.