Ray Lake, located in Fremont, Wyoming, is a Federal-owned water resource managed by the Bureau of Indian Affairs. Built in 1925 for irrigation purposes, this earth dam stands at a height of 20 feet and has a storage capacity of 8,660 acre-feet. With a surface area of 540 acres and a drainage area of 5 square miles, Ray Lake plays a crucial role in providing water for irrigation, fire protection, stock, and small fish pond purposes.

Despite its age, Ray Lake poses a high hazard potential and is classified as Very High risk due to its condition assessment being labeled as "Not Available." The dam has a controlled spillway type with no width specified, and last underwent inspection in August 2012. With a maximum discharge of 727 cubic feet per second, the dam's risk management measures and inundation maps remain unspecified, raising concerns for potential emergencies and the need for updated emergency action plans. Despite these challenges, Ray Lake continues to support the local community and environment through its water supply functions.

As a key feature in the Mill Creek watershed, Ray Lake's significance extends to water resource and climate enthusiasts. Its location in the scenic landscape of Lander, Wyoming, adds to its appeal, drawing attention to the importance of sustainable dam management practices and the need for ongoing monitoring and maintenance to ensure the safety and resilience of this vital water resource in the face of changing climatic conditions.