Allegan is a city in the U.S. state of Michigan. Its population was 4,998 at the 2010 census. It is the county seat of Allegan County. It lies within Allegan Township but is administratively autonomous. Allegan was named in a neologism by Michigan historian Henry Rowe Schoolcraft in 1837 to sound like a Native American word. Land was purchased from government to form the downtown business district; village organization came in 1838 with city incorporation authorized in 1907.Allegan is in the south-central portion of the county. To the west and northwest is the nearly 50,000 acre forest Allegan State Game Area for which the city is considered a gateway. Lake Allegan in Valley Township is also a tourist destination for boating, fishing, and swimming. Allegan's dense forests, lakes, and river geography served as a source of water power, trade routes for steamboats, and timber production. Once cleared, it became a center for business, industry and expansive farmland.

Marshall is a city in the U.S. state of Michigan. It is part of the Battle Creek, Michigan Metropolitan Statistical Area. The population was 7,088 at the 2010 census. It is the county seat of Calhoun County.Marshall is best known for its cross-section of 19th- and early 20th-century architecture. It has been referred to by the keeper of the National Register of Historic Places as a "virtual textbook of 19th-Century American architecture." Its historic center is the Marshall Historic District, one of the nation's largest architecturally significant National Historic Landmark Districts. The Landmark has over 850 buildings, including the world-famous Honolulu House.

South Haven is a city in the U.S. state of Michigan. Most of the city is in Van Buren County, although a small portion extends into Allegan County. The population was 4,403 at the 2010 census. Because of its position on Lake Michigan, at the mouth of the Black River, South Haven has always been a port city. During settlement, major ship lines stopped there, both passenger and freight. In the early 1900s South Haven became a resort town, sometimes referred to as "The Catskills of the Midwest." South Haven is a major regional tourist draw because of its recreational harbor and beaches. It is the western terminus of the Kal-Haven Trail, popular with bicyclists and snowmobilers. Nearby are Van Buren State Park and the Van Buren Trail State Park. Noted botanist Liberty Hyde Bailey was born in South Haven. His childhood home was presented to the city in the 1930s, and is now a museum.