Were there any festivals involving Pluto?

Yes, in ancient Roman religion, there were festivals dedicated to Pluto, the god of the underworld. One notable celebration was the "Ludi Plebeii," which included various games and festivities honoring deities associated with the afterlife. Additionally, the "Parentalia," a festival in February, involved honoring deceased ancestors and included rites dedicated to Pluto and Proserpina, his counterpart. These events reflected the Romans' beliefs and reverence for the afterlife and their ancestors.