Weiss - FS 3445

Trail Overview

Federal Forest Service Road (FS) 3445, also known as Weiss, 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 a "There-and-Back" route off of H63- Mackinac Trail; it is not a DNR road (ORV use is subject to local government regulations). Seasonally, this route has a 50-inch restriction gate at the entrance of the bridge that traverses over the Carp River. Vehicle access is limited to vehicles 50 inches in width or less between April 1 and November 30. Description created on September 17, 2025.

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Difficulty

Dirt, sand, grass, and a rooted path, typically unmaintained after rain or snow, which may give rise to shallow water crossings and obstacles under 12 inches on the trail, including small ledges. This route is a narrow "Two-Track" that is one vehicle in width. Vehicle access is limited to vehicles 50 inches in width or less between April 1 and November 30.

History

The Carp River, flowing into St. Martin Bay near St. Ignace, Michigan, is historically significant for its 19th-century logging, fishing, and unique geology. The area features the 1920s-era Mackinac Trail-Carp River Bridge (National Register of Historic Places) and flows through flat land, providing habitats for trout, salmon, and, historically, native white suckers. Geological Significance: The river flows east-to-west along the strike of bedrock, unique in a region where rivers usually flow north-south, and it features distinct karst features, according to the National Wild and Scenic River System. Historic Bridge: The Mackinac Trail-Carp River Bridge was constructed in 1920, listed on the National Register of Historic Places in 1999, and restored in 2010 to continue servicing local traffic. Logging and Industry: In the late 19th century, the area surrounding St. Ignace was a hub for lumbering and fishing. The river was a key part of this ecosystem, supporting regional industry as St. Ignace grew into a major shipping point. Early History: The Carp River area was home to significant prehistoric Native American sites, and early settlers often named it for the large, native sucker fish found there. Ecological Surveys: In the 1950s, the Michigan Department of Natural Resources conducted extensive studies on the Carp River watershed, confirming it as a habitat for brook, brown, and rainbow trout.

Technical Rating

Weiss - FS 3445 can be accessed by the following ride types:

• High-Clearance 4x4
• SUV
• SxS (60")
• ATV (50")
• Dirt Bike