Rock of Ages Light

From lighthouses

Isle Royale, Michigan

Built: 1908

Automated: 1978

This still active light marks the dangerous rocks off the southwest tip of Isle Royale in Lake Superior. The cylindrical "bottle shaped" steel and concrete tower is 117 feet tall and sits on a large steel caisson, giving it a focal plane of 130 feet. A temporary third order lens was originally placed in the tower until 1910, when the permanent second order Fresnel lens was installed. That second order lens is now on exhibit at the Windigo Information Station of Isle Royale National Park.

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Lighthouses: A Photographic Journey

Conceived and Developed by David S. Carter

Photographs by Donald W. Carter

Text by Diana K. Carter, Donald W. Carter & David S. Carter

Copyright © 1995-2011 David S. Carter, Donald W. Carter, & Diana K. Carter. All rights reserved. Reproduction by any means, physical or electronic, in part or in full, without the express permission of the authors, is strictly prohibited.

This article was last modified on 5/28/2009.