Spiral Trackway or also known as Pike 21 is the fifty-first studio album by guitarist Buckethead, and the twenty-first installment of the Buckethead Pikes Series.The album was announced on July 29 simultaneously along with the following installment, Sphere Facade as a limited edition, untitled album with hand drawn covers and signed by Buckethead himself. Both albums were intended to be released on August 23, but got pushed back to September 3.