Testeboåns Delta Naturreservat is a nature preserve located at the mouth of Testeboån in Gävlebukten. This area features remnants of a larger delta landscape, which has resulted in a diverse range of habitats, including deciduous forests and wetlands. The preserve is recognized for its ecological significance and supports a rich variety of birdlife, making it an ideal location for birdwatching.
The nature reserve also offers excellent fishing opportunities and promotes outdoor activities in line with Allemansrätten, the Right of Public Access in Sweden. Visitors can engage in ecological tourism and nature exploration while adhering to guidelines for nature conservation and access rights. Additionally, educational resources are available to inform the public about local wildlife and ecosystems, enhancing the understanding of the area's natural heritage.