Hey there, Anne!
A warm welcome to planDisney. Thank you for sending us your magical question about
Walt Disney World Resort theme park transportation options.
Anne, you will be able to travel from Epcot to Magic Kingdom Park via
monorail! This is by far the best and most convenient option for traveling between Epcot and Magic Kingdom Park.
Complimentary Walt Disney World Resort transportation options, including the monorail, generally operate from 45 minutes before a theme park's opening time until one hour after a theme park's closing time.
I hope this helps answer your question, Anne. I hope you have a spook-tacular time at Disney After Hours Boo Bash. If you have any other questions, don’t be “scared” to return to planDisney.
With a Sprinkling of Pixie Dust,
Priscila