The Rock River is a 6.1-mile-long stream in Baraga County on the Upper Peninsula of Michigan in the United States. It rises at the outlet of Worm Lake, east of Covington, and flows northwest. It eventually empties into the Sturgeon River which continues west, then north to Portage Lake and Lake Superior. The Rock River descends 350 feet over its 6-mile cou…The Rock River is a 6.1-mile-long stream in Baraga County on the Upper Peninsula of Michigan in the United States. It rises at the outlet of Worm Lake, east of Covington, and flows northwest. It eventually empties into the Sturgeon River which continues west, then north to Portage Lake and Lake Superior. The Rock River descends 350 feet over its 6-mile course, for an average rate of 58 feet per mile.
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