3 listings in Grand Rapids, 1 of them farmers markets. 1 has a market day and hours from a public register or the market's own website, and 1 appears in the USDA SNAP retailer register. Market days in Grand Rapids: Wednesday (1), Saturday (1).
Few Grand Rapids listings have a schedule or SNAP authorization we could source. Duluth, 71 miles away, has 15 listings with more sourced detail; see also all of Minnesota.