Grayling Marsh, also known as Mud Lake, is a state-regulated fish and wildlife pond located in Aitkin, Minnesota. Managed by the Minnesota Department of Natural Resources, this marsh serves as a vital habitat for various species of birds, fish, and other wildlife. With a normal storage capacity of 438 acre-feet and a maximum storage of 1500 acre-feet, Grayling Marsh plays a crucial role in maintaining the ecological balance of the region.

Constructed with a buttress core type and a height of 8 feet, Grayling Marsh has a low hazard potential and is deemed to be in fair condition as of the last assessment in 2017. While the dam does not have a spillway or outlet gates, its primary purpose as a fish and wildlife pond underscores its importance in supporting biodiversity in the area. Visitors to Grayling Marsh can witness firsthand the beauty of this wetland ecosystem and appreciate the efforts made to preserve and protect this natural resource.

As climate change continues to impact water resources and ecosystems, the conservation of wetlands like Grayling Marsh becomes increasingly crucial. With state-mandated inspections, permitting, and enforcement in place, Grayling Marsh stands as a testament to the commitment of the Minnesota Department of Natural Resources to safeguarding the environment. By ensuring the continued health and functionality of Grayling Marsh, water resource and climate enthusiasts can witness the resilience of nature in the face of ongoing challenges.