Police investigating the disappearance of a 59-year-old believe she parked up her car near Skegness seafront in the early hours.
Shirley Cranston has been missing from the Burgh Le Marsh area since the early hours of Thursday, March 12.
Lincolnshire Police said she is 5 feet 7 inches and often wears a headscarf.
She left her car on the North End car park in North Parade.
Anyone who has seen Shirley has been urged to call 101 and quote incident 60 of March 13.