Police have found a body at the weekend and believe it is missing man Gareth Pinder.
Officers found the body in East Keal on the morning of Saturday, August 11.
Formal identification has yet to take place but officers believe it is Gareth Pinder, 43, who was reported missing from Spilsby on August 3.
Family members have been informed, police said.
The incident is not being treated as suspicious.