Cody Wolfe hasn't been seen since April 29, 2011.

A grim anniversary is being marked today by family and friends of Cody Wolfe.

Wolfe was last seen at his grandmother's home on the Muskowekwan First Nation on the night of April 29, 2011.

The 17-year-old had left the home and gone for a walk to another residence, but he never arrived and hasn't been seen since.

An extensive search effort, involving family members and police, was launched on the reserve located 130 kilometres north of Regina.

At one point a helicopter was used to search for Wolfe.

Police are asking anyone with information about Wolfe's disappearance to call the Regina RCMP Historical Case Unit at (306) 780-5582 or Crime Stoppers at 1-800-222-8477.