Hidden Lake, also known as Wilderness Lake Dam, is a private dam located in High Valley, Idaho, owned by a private entity. This dam serves as a Fish and Wildlife Pond, with a primary purpose of supporting local wildlife in the area. Constructed in 1970, Hidden Lake stands at a height of 25.9 feet and has a storage capacity of 375 acre-feet.

The dam is made of earth and stone materials, with a spillway type classified as 'Uncontrolled'. The structure has been inspected periodically, with the last assessment in June 2018 revealing a fair condition. Despite its significant hazard potential, the risk assessment for Hidden Lake is moderate, indicating a level 3 risk. The dam's emergency action plan status and risk management measures are currently undisclosed.

Overall, Hidden Lake is a crucial water resource for the region, supporting fish and wildlife populations. With its unique design and purpose, this dam plays a vital role in maintaining the ecological balance of the area and must be monitored closely to ensure its continued safety and effectiveness.