This event inspired the Sky River Rock Festival and Lighter Than Air Fair which occurred later that year.

Lovecraft, Pink Floyd (who were on the poster but in Europe at the time and did not play), Country Weather, Easy Chair, Floating Bridge, Steppenwolf, Frumious Bandersnatch, New Lost City Ramblers, It's a Beautiful Day, The Youngbloods, My Indole Ring, Mother Tucker's Yellow Duck, Billy Roberts, Alice Stuart Thomas, Josh White, San Francisco Mime Troupe, Ramblin' Jack Elliot, Juggernaut, Phoenix, Sons of Champlin, Mystic Knights of the Sea, Gale Garnett's band The Gentle Reign (sans Garnett), The Peanut Butter Conspiracy, Marble Farm, The Allman Joys, Black Snake Boogie, Flamin' Groovies, Salvation, Anonymous Artists of America.

[5] The last day members of the Grateful Dead jammed with James Cotton, Big Mama Thornton, and Billy Roberts.

The lineup had James Cotton, Country Joe and the Fish, Flying Burrito Brothers, Buddy Guy, Dan Hicks and His Hot Licks, Dr. Humbead's New Tranquility String Band, Kaleidoscope, Mississippi Fred McDowell, The Steve Miller Band, New Lost City Ramblers, Pacific Gas & Electric, Billy Roberts, Sons of Champlin, Mark Spoelstra, and many others.

"Dr. Humbead's New Tranquility String Band and Medicine Show" consisted of Sue Draheim, Jim Bamford, Mac Benford, and Will Spires.

It was billed as the Stop the Rock Festival Committee, meeting on August 21, led by a leader of the local John Birch Society, who claimed they couldn't allow an event that was the “glorification of communist movements in foreign countries.” Landowners and the Tenino Chamber of Commerce filed suit, the suit claimed there would be a noise impact on cows (“…it would cause them to lose flesh.