Lindsey, 11, last was seen in McCleary after 9 p.m. June 26, after she left a friend’s home on Maple Street by herself to walk about a half-mile to her home on Mommsen Road.
Despite a massive search, police have been unable to find Lindsey or say definitively whether she was abducted.
KlaasKids Foundation representatives will hold a community meeting at 7 p.m. Thursday in McCleary at the McCleary Community Center.
The McCleary Community Center is at 726 W. Simpson Ave.
KlaasKids spokeswoman Tricia Griffith said the search will start at 9 a.m. Friday. People who want to help should check in at the McCleary Community Center between 9 a.m. and 4:30 p.m. that day. Volunteers must be 18 or older and must bring photo identification.
Volunteers are advised to dress appropriately for the weather, wear long pants and wear sturdy, closed-toe shoes.
The KlaasKids Foundation was established by Marc Klaas in 1994 to stop crimes against children after the kidnapping and murder of his 12-year-old daughter, Polly Hannah Klaas. She was taken from her home in Petaluma, Calif.