Glastonbury has long been associated with mud
Heavy showers of rain on Monday morning caused headaches for drivers leaving the Glastonbury Festival site in Pilton.
Cars stuck in the mud caused big delays and one driver told the BBC it took four hours to leave the Somerset site.
Traffic was heavy with major delays on the A37 southbound from Pylle and the A39 westbound to the M5.
BBC West weatherman Ian Fergusson advised motorists to carry water in their cars as temperatures soared.
Despite the traffic problems at the start and close of the festival, organiser Michael Eavis said it was the "best festival ever".
Police said overall levels of crime were down, although there was a slight increase in arrests for drug offences.
In total, 445 crimes were recorded by police, compared to 483 at the same time the previous year.
The number of thefts from tents and of mobile phones fell sharply from previous years.
Police trialled new methods of patrolling the site in tandem with festival security staff, this year.
Ch Supt Kay Wozniak of Avon and Somerset Police said: "Managing 177,000 in one place is no mean feat, but working with Glastonbury Festival Ltd has gone very well and we're very pleased with how things have turned out."
A total of six people were identified by festival medical staff as having possible swine flu symptoms.
The people identified - and those in close contact with them - were given anti-viral drugs on site and all left the site on advice of doctors.
All six had mild flu symptoms.