Hi there, Latasha! Thanks for stopping by the Disney Parks Moms Panel and asking your question. You are in for a ghoulishly good time at the Mickey's Halloween Party this year!
Your
Mickey's Halloween Party ticket grants you entry three hours before the party starts (no additional theme park admission required). This year, that includes admission to both Disneyland Park and Disney California Adventure Park. So, if the party starts at 7:00 p.m. on the night you are attending, you could start your evening at Disney California Adventure Park at 4:00 p.m. and enjoy all the
Halloween Time fun there including the complete Haul-o-Ween overlay of Cars Land. Then, you can hop over to Disneyland Park to experience the actual party. If you want to visit the parks earlier in the day prior to the three-hour window before Mickey's Halloween Party, then you will need a regular theme park ticket or a Park Hopper ticket.
Don't forget that your Mickey's Halloween Party ticket also includes all your
PhotoPass photos taken during the event! So make sure to have as many pictures taken as possible while you meet Villains or Jack Skellington or just while you are out and about during the party.
I hope this helps clarify things for you. Have a wonderful time at the Happiest Place on Earth!
-Linda M.