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. On July 14, 2014 the album was released digitally which included the official album title, cover, and track names.
A standard edition was also announced but has not yet been released.