Question: The book Last Go Round written by Ken Kesey and Ken Babbs is based on what historical rodeo?

Context paragraphs:
Ken Babbs: Ken Babbs (born January 14, 1936) is a famous Merry Prankster who became one of the psychedelic leaders of the 1960s.  He along with best friend and Prankster leader, Ken Kesey wrote the book "Last Go Round".  Babbs is best known for his participation in the Acid Tests and on the bus "Furthur".

Sailor Song: Sailor Song is a 1992 novel written by Ken Kesey.  The only work of long fiction solely written by Kesey after "Sometimes a Great Notion" (1964), "Sailor Song" depicts the lives of the residents of Kuinak, a small town in Alaska, in the 2020s.

Kesey's Garage Sale: Kesey's Garage Sale is a collection of essays written by Ken Kesey.  The book features the play "Over the Border" which is based on the time Kesey spent hiding in Mexico from drug charges in the United States.  It is illustrated by the cartoonist and Merry Prankster Paul Foster.

The Electric Kool-Aid Acid Test: The Electric Kool-Aid Acid Test is a nonfiction book by Tom Wolfe that was published in 1968.  The book is remembered today as an early – and arguably the most popular – example of the growing literary style called New Journalism.  Wolfe presents an as-if-firsthand account of the experiences of Ken Kesey and his band of Merry Pranksters, who traveled across the country in a colorfully painted school bus named "Further".  Kesey and the Pranksters became famous for their use of LSD and other psychedelic drugs in hopes of achieving intersubjectivity.  The book chronicles the Acid Tests (parties in which LSD-laced Kool-Aid was used to obtain a communal trip), the group's encounters with (in)famous figures of the time, including famous authors, Hells Angels, and The Grateful Dead, and it also describes Kesey's exile to Mexico and his arrests.

Caverns (novel): Caverns is a 1989 novel written collaboratively as an experiment by Ken Kesey and a creative writing class that he taught at the University of Oregon.  The cover of the book says it was written by O.U. Levon—the name of this supposed author, spelled backwards, is "novel U.O." (University of Oregon).  The full list of authors is: Robert Blucher, Ben Bochner, James Finley, Jeff Forester, Bennett Huffman, Lynn Jeffress, Ken Kesey, Neil Lidstrom, H. Highwater Powers, Jane Sather, Charles Varani, Meredith Wadley, Lidia Yukman and Ken Zimmerman.

Jackson Sundown: Jackson Sundown (1863 – December 18, 1923), born Waaya-Tonah-Toesits-Kahn (meaning Blanket of the Sun), was a Native American rodeo rider who has become a folk-hero for his mythic performance in the 1916 Pendleton Round-Up, largely popularized by Ken Kesey's novel "The Last Go 'Round".

The Storyteller (sculpture): The Storyteller, also known as the Ken Kesey Memorial, is an outdoor bronze sculpture by Pete Helzer, installed at Broadway Plaza (located at Broadway and Willamette Street) in Eugene, Oregon, in the United States.  Unveiled in 2003, it depicts American novelist, essayist, and countercultural figure Ken Kesey reading to his three grandchildren, Kate Smith, Caleb Kesey and Jordan Smith.  Plaques on the base of the sculpture contain excerpts from Kesey's novels "One Flew Over the Cuckoo's Nest" (1962) and "Sometimes a Great Notion" (1964).

Demon Box (book): Demon Box is a 1986 collection of works by Ken Kesey.  The book includes nonfiction and fiction short stories as well as some of Kesey's essays.

Last Go Round: Last Go Round (1994) is a novel written by Ken Kesey and Ken Babbs.  It was Kesey's last novel and is about the famous "Last Go Round" that took place at the original Pendleton Round-Up in 1911.  The book contains references to real historical figures, and was published with photographs from the early days of the Pendleton rodeo.  However, the story is written as a tall tale, with characters and feats that are larger than life.

Go Round (song): "Go Round" (released with "Yeah-Oh" as "Go Round/Yeah-Oh") is a song by Japanese recording artist Namie Amuro from her tenth studio album "Uncontrolled" (2012).  It was released as a double a-side single with another album track "Yeah-Oh" and was served as the fourth single on March 21, 2012 by Avex Trax.  "Go Round" was written by Aili, produced by T-Sk and co-composed by Tesung Kim and Australian duo Nervo.  With a cover sleeve, photographed by Takaki Kumada, showing Amuro in front of a blurry window pane, "Go Round" was recorded both in English and Japanese language and is a dance-pop song.

Supporting paragraphs: Last Go Round Ken Babbs
Answer: Pendleton Round-Up in 1911