Hidden Lake, located in Marlboro, Vermont, is a picturesque reservoir with a rich history dating back to 1850. The dam, primarily used for recreation, stands at a height of 10 feet and has a storage capacity of 120 acre-feet. The surrounding area covers 19 acres and drains into the Marlboro Branch-TR stream, making it a vital part of the local ecosystem.

Managed by private owners and regulated by the Vermont Department of Environmental Conservation, Hidden Lake has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. Although the dam has not been modified in recent years, regular inspections are conducted every 10 years to ensure its structural integrity and safety. Despite its low-risk profile, the dam plays a crucial role in water resource management and climate resilience in Windham County.

Water resource and climate enthusiasts will be intrigued by Hidden Lake's unique design, with a masonry dam constructed on a foundation of rock. As one of the few dams in the area with such characteristics, Hidden Lake offers a glimpse into the engineering practices of the 19th century. With its serene surroundings and historical significance, Hidden Lake serves as a reminder of the importance of preserving our natural resources for future generations to enjoy.