Trail Overview

Federal Forest Service Road (FS) 3163A, also known as Old Castle Rock Trail Spur A, is a federally owned/ locally maintained, Level-2/ Level-3 forest road with a surface composition of dirt, sand, gravel, and native material. This route is currently open and in fair condition; it is not a DNR road (ORV use is subject to local government regulations). This route is a there-and-back from FS 3163- Old Castle Rock Trail. Description created on September 17, 2025.

Photos of Old Castle Rock Spur A - FS 3163A

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Difficulty

Dirt, gravel, sand, grass and rooted path, typically unmaintained after rain or snow that may give rise to shallow water crossings and obstacles under 12 inches on the trail, including small logs. This route is a narrow "Two-Track" that is one vehicle in width.

History

Castle Rock is a 195-foot limestone stack and an ancient Ojibwa lookout known as "Pontiac’s Lookout". Opened to tourists in 1929 by Clarence Eby, it has been a family-owned attraction for over 90 years. The site offers panoramic views of Lake Huron, Mackinac Island, and the Mackinac Bridge.

Technical Rating