Alewife day on Blackman stream gives people a chance to see the fish population up close.
Museum staff said the alewife population dropped when sawmills along the stream put in dams, but now the fish are back and there are expected to be hundreds of thousands of fish swimming by this year.
Museum staff said smoked alewives were historically an important trading item, and Saturday's event gave the next generation of Mainers a chance to the fish.
The executive director of Maine forest and logging museum Sherry Davis said, "I'm all about getting kids out to see and participate in hands-on history. These kids can lay on their stomachs and pick up a fish, and there are not too many places you can do that."
The Maine forest and logging museum also has a steam Lombard and a visiting gas Lumbard on display, which were important to Maine's logging industry.