Hello Mary!
Thanks for stopping by planDisney and asking a great question! It sounds like you are planning a magical day at the
Disneyland Resort!
If you desire to add the Park Hopper Option to your existing single-day ticket, you can contact
Ticket Services by phone to discuss your options of adding Park Hopper before your Disneyland vacation. Another option would be to stop by the Disneyland Resort Main Entrance Booths on the day that you want to use your
Disneyland Resort ticket and speak to a Cast Member about adding the Park Hopper Option to your ticket. Keep in mind that the One Park Per Day Tickets and Park Hopper Tickets have different
Theme Park Reservation Availability. So when you speak with the Cast Member, let them know your current reservation date, and they can see if there is availability for the Park Hopper ticket on the day you plan to go. You can also use the "Chat with Us" feature in the
Disneyland Mobile App to see if the Park Hopper Option can be added to your ticket before your Disneyland Resort vacation.
I hope that your day at the Disneyland Resort is magical!
Marc L.