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Crescent Bay is a full-service boat access point located on Muddy Creek where it feeds into Lake Arthur in Portersville. This is a convenient launch for paddlers and motorboaters, with boat rental services available during summer months. The facility offers a variety of rental options including kayaks, canoes, and motorboats, making it an accessible entry point for both experienced paddlers and beginners. Additional amenities include fuel, ice, and fishing bait for purchase on-site.
Lake Arthur is a scenic recreational lake within Moraine State Park, offering calm, protected waters suitable for paddling, fishing, and water sports. Kayakers and canoeists will find relatively sheltered conditions here compared to moving rivers. A state park permit is required for certain activities like windsurfing. With 10 launches available around the lake, paddlers have multiple entry points to explore different sections. Crescent Bay's location on the Muddy Creek inlet provides good access to both the creek and the broader lake system.