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Mark Birkle: Grayson Lake KY - Paddle Vortex
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Mark Birkle: Grayson Lake KY Grotto Falls
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Mark Birkle: Grayson Lake - Kayaker
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Mark Birkle: Grayson Lake Grotto - Passage Out Color
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Mark Birkle: Grayson Lake - Grotto - The Way In
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Mark Birkle: Grayson Lake Kentucky State Park - Bob