Sue Fritz, age 10, of Casper, Wyo., for her question:

HOW LARGE IS RAINY LAKE?

Famous Rainy Lake lies on the boundary of Ontario, Canada, and Minnesota, about 125 miles north of Duluth, Minn. It covers about 350 square miles.

There are thousands of islands scattered throughout Rainy Lake. The largest stretch of open water is only about one mile wide.

The Canadian National Railway crosses the lake almost at its center on bridges that link quite a number of islands.

Stands of spruce and pine cover the rocky shores of Rainy Lake. Many of these trees are cut for paper mills at Fort Frances and International Falls, located at the west end of the lake: A dam at Fort Frances harnesses water for power.

Sportsmen catch pike, pickerel and other kinds of fish in Rainy Lake. Whitefish taken from the waters are sold commercially. The region around the lake is noted for bear, moose and other wild game. The Rainy River carries overflow waters westward to the Lake of the Woods.