Marie and Lyle McCann were last seen July 3. (RCMP)

Family and friends have launched their own search for an Alberta couple missing since early July.

Lyle McCann, 78, and his wife, Marie, 77, left St. Albert, Alta., on July 3 bound for British Columbia. They were last seen that day at a gas station in the city just west of Edmonton.

Their son Bret McCann said more than a dozen friends and family members spent Saturday combing an area east of Edson for any sign of the couple.

"I mean, we still have our full faith in the police. But some of [the family], they just can't stand waiting around, so they felt they had to do something," he said.

McCann also reiterated that the family is offering a $60,000 reward for any information leading to the arrest and conviction of anyone responsible for the elderly couple's abduction.

He encouraged anyone with information, no matter how insignificant it might seem, to contact Crime Stoppers.

The McCanns had been driving a motorhome, which was towing their green Hyundai Tucson SUV. They were reported missing July 10 after they failed to meet up with their daughter in Abbotsford, B.C.

RCMP later confirmed that their burned-out motorhome was found in a campground on July 5. The SUV was found in a wooded area near Edson on July 16.

The RCMP named Travis Vader, an Alberta man, as a suspect in the case on Aug. 31 but no charges related to the McCann investigation have been laid.