The North Smithfield Heritage Association will hold a Heritage Walk on Saturday, Jan. 20 covering Woonsocket Reservoir #3 including NS38 Oliver Smith Lot, Amasa Sweet Quarry, Great Wall, William Mowry Homestead and the Obed Paine Homestead. Participants will meet at the North Smithfield High School tennis courts on Grange Road at 9:30 a.m.