Dundalk on Friday evening was transformed into Santafest as 7,000 walkers took on a Guinness World Record.
"They must be wearing a Santa costume and walk the mile course for it to count," said Amy Fitzpatrick of Dundalk Chamber of Commerce.
The attempt to put Dundalk on the map was the culmination of efforts by the chamber and businesses, with profits going to five local charities.
The town was hopping all evening as Santas flooded into the square after the event for the festival of lights ceremony.
Entrants from eight weeks to 80 years got behind the attempt to beat an existing record of 4,000 while a magical 4,900 crossed the finishing line with official tags.
Although the majority of people taking part were from the local area, many were prepared to make the journey from Cork, Dublin and the UK to be part of this living history. "We were only expecting 5,000 and didn't have enough costumes, so many brought their own," said Amy.
"It's only a mile which really encouraged people to get out and get active."
Collette O'Hagan, who is more accustomed to the classic 26.2 distance, said: "Tonight was all about the community and families coming together."