What is the bay midway between the Niagara and St. Lawrence rivers, 3.5 miles east of the Genesee River?

The correct answer, Irondequoit Bay, is indeed midway between the Niagara and St. Lawrence rivers and is located approximately 3.5 miles east of the Genesee River. This bay is a significant geographical feature in the region, representing a connection between the waters of Lake Ontario and the surrounding areas. Irondequoit Bay is known for its recreational opportunities, wildlife, and scenic views, making it a well-known location for both locals and visitors.

Irun Bay, while a recognizable name, does not exist in this geographical context. Big Sandy Bay is also incorrect as it is not situated between the two rivers mentioned, and Oak Orchard Bay is located further from the stated coordinates. Irondequoit Bay is the only option that accurately fits the description given in the question, making it the clear choice.