A Valencia man was among the seven Zion National Park Keyhole Canyon hikers who were overtaken by a flash flood in Utah on Monday, Sept. 14, 2015. Don’t miss a thing. Get breaking Santa Clarita news alerts delivered right to your inbox. The park identified the hikers as Mark MacKenzie, 56, of Valencia, Linda Arthur, 57, of Camarillo, Steve Arthur, 58, of ...

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