North Georgia residents are invited to don a purple shirt and walk the streets of Gainesville to raise funds and awareness for Alzheimer’s disease. The Alzheimer's Association Georgia Chapter is encouraging area residents to participate in the Walk to End Alzheimer's beginning at 8 a.m. Saturday at the American Legion Post 7 at 2343 Riverside Drive. Nearly 200 people are expected to participate in the 3-mile walk to raise awareness and funds to fight Alzheimer's disease.