They were seeing red... but it was all for a good cause.
That's because a sea of red descended on Londonderry on Saturday as hundreds of people donned Santa suits to raise around £5,000 for the Foyle Hospice charity.
It was cold but there was no snow for the Santas to dash through as part of a five-kilometre run which started on the west bank of the River Foyle and made its way over the Peace Bridge.
For others who wanted a more sedate pace, families were also able to take part in a two-kilometre stroll.
Foyle Hospice Community Fundraiser Michelle McGinn said: "We rely heavily upon the support and donations from the public, so through events such as our 'Santa Dash/Stroll' people not only make a difference to those suffering from cancer and other life limiting illnesses right here in their own area, but also enjoy the experience and learn more about all aspects of Hospice Care."
She added: "We were overwhelmed by the response, totally blown away.
"Running has really taken off in the city and quite a few clubs have sprung up in recent months and we had good support from them.
"And we also had a two-kilometre stroll for family groups including kids and even dogs. We had 420 people. Everyone loved it and we aim to do it next year and be bigger.
"There were many spectators along the route and you could have written a book with the stories by participants about why they were taking part and the links they had to the hospice," Michelle added.