Herbert Brook Trail (unmarked) is a hiking trail in Essex County, New York. It is within High Peaks Wilderness and Adirondack Park. It is 1.7 miles long and begins at 4,360 feet altitude. Traveling the entire trail is 3.4 miles with a total elevation gain of 1,648 feet. The trail ends near the Herbert Brook Lean-to shelter and Mount Marshall (elevation 4,373 feet). There are also a camp site and viewpoints near the end of the trail.