There was a very good article today in our local newspaper, the Rochester (NY) Democrat and Chronicle, about farmers markets in the area. The paper listed many of the local markets along with the days they start their seasons, when they are open, contact information, and, often, websites.
Even if you do your own gardening, farmers markets can be a great place to pick up local prepared foods like baked goods, jams and jellies, as well as crafts. It helps you support your local economy and cut down on the carbon cost of getting your food to you.
The US Department of Agriculture maintains a website that will help you find a market near you.