Hello Chris!
Thanks so much for stopping by the Disney Parks Moms Panel. I hope you are having a magical week.
On select days in October, Disneyland Park will close early for
Mickey’s Halloween Party, a fun special event that does require a
separate ticket. It will be open during the day to all guests though, and the event is not every day. Disney’s California Adventure Park will be open to all guests during it’s regularly posted hours so I would suggest getting the Park Hopper option for your
Disneyland Resort Theme Park Tickets so you can go back and forth between the two parks during your visit. Or, alternatively, you could simply plan on being at Disney’s California Adventure Park the day of this event and Disneyland Park on a different day.
I hope this helps and let me know if you have any other questions as you plan your visit!
See you real soon!
-Emily