Some ticket-holders have been stuck in queues of up to 12 hours after traffic chaos hit all major routes to the site in Shepton Mallet.
More than 100,000 people are due to descend on Worthy Farm for the event, which has already turned into a mudbath.
It wouldn't be Glastonbury without mud, rain and traffic - but people arriving at the site in Somerset have refused to get bogged down.