Interstate 35 South - Minnesota to Mason City

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I-35/Iowa 27 (Avenue of the Saints) cross the Winnebago River south into Cerro Gordo County.
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Previous guide signs for Exit 197 for County Route B20 did not reference Mason City.
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Iowa 122 east represents the first of two exits for the city of Clear Lake and second of three for Mason City.
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CR B35 meets I-35 just south of Iowa 122 near Clear Lake State Park and Mason City Industrial Park.
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U.S. 18 accompanies I-35/Iowa 27 south to Exit 190 as part of its freeway bypass of Mason City.
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The Avenue of the Saints corridor (Iowa 27) turns east alongside U.S. 18 to Charles City.
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The Avenue of the Saints corridors heads south from U.S. 18 at Charles City along U.S. 218 to Waverly, Cedar Falls and Waterloo.
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U.S. 18 extends across northeastern Iowa to Calmar, where it overlaps with U.S. 52, and across the Mississippi River to Prairie du Chien, Wisconsin at Marquette.
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A collector distributor roadway connects I-35 south with the continuation of U.S. 18/Iowa 27 east as part of a partially built cloverleaf interchange.
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County Route B60 travels east beyond Rockwell to Marble Rock in Floyd County.
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