Spiro Mounds Birthday Bash May-08-21 9:00 am - May-08-21 5:00 pm Spiro Mounds Phone:(918) 962-2062Website:http://www.okhistory.org Spiro Mounds to host Birthday Bash May-08-21 9:00 am - May-08-21 5:00 pm Spiro Mounds Phone:(918) 962-2062Website:http://www.okhistory.org