Hutovo Blato is a nature reserve and bird reserve located in Bosnia and Herzegovina. It is primarily composed of marshlands that were created by the underground aquifer system of the Krupa River. The reserve is on the list of BirdLife International Important Bird Areas. It is the largest reserve of its kind in the region, in terms of both size and diversity. It is home to over 240 types of migratory birds and dozens that make their permanent home in the sub-Mediterranean wetlands surrounding Deransko Lake.
Since 1995, Hutovo Blato has been protected as a Hutovo Blato Nature Park and managed by a public authority. The whole zone is well protected from human impact and functions as an important habitat for many plants and animals . The historical site, Old Fortress Hutovo Blato, is located in the area of Nature Park.
