These are the Disneyland rides you can only go on at Halloween time. They transform into being spooky and are so much fun to go on. This year Halloween starts at Disneyland on August 22nd and goes until October 31st.
Haunted Mansion Holiday

Haunted Mansion transforms into Haunted Mansion Holiday for the Halloween season. It gets a Nightmare Before Christmas overlay that is so fun to see. This overlay stays through the Christmas season too, so you can usually experience it until the beginning of January. This is the only Halloween ride that does not have a height limit to ride it.
Mater’s Graveyard JamBOOree

Mater’s Junkyard Jamboree changes into Mater’s Graveyard JamBOOree for the Halloween season. It get spooky purple lights everywhere and lots of cobwebs throughout.
Luigi’s Honkin’ Haul-O-Ween

Luigi’s Rollickin’ Roadsters is another attraction in Cars Land that changes for Halloween. It changes into Luigi’s Honkin’ Haul-O-Ween. It has Halloween decor and plays halloween music.
Guardians of the Galaxy – Monsters After Dark

Guardians of the Galaxy – Mission: BREAKOUT! is a popular attraction in Avengers Campus in California Adventure park. At night it becomes Monsters After Dark. There are spooky lights on the outside of the building and the ride changes to a Halloween adventure.
Other Halloween Fun

Aside from the rides, there is a lot of Halloween fun to be had at Disneyland. You can meet Mickey and friends in Halloween outfits, Cars in Cars Land in costumes, see the Halloween Screams show, Main Street Pumpkin Festival, and so much more.