Area residents are invited to take part next Sunday in the third annual Walk MS Wakefield, a 3-mile walk around Lake Quannapowitt to support research into finding a cure for multiple sclerosis. The event is organized by Wakefield residents Adam Pinkney, who has multiple sclerosis, and Jason Carrier, whose mother has the disease, The two started the event as a community walk in 2012, raising about $20,000. The following year, the walk was officially adopted by the Greater New England chapter of the National Multiple Sclerosis Society. That year, it attracted 430 participants and raised $85,000. Pinkney and Carrier are hoping to raise $100,000 this year. As of last week, 350 people had registered to participate in the event, which will begin at 10 a.m. at 1 Common St., next to the lake. To register or for more information, go to walkMSgne.org.