The Ruda Nature Reserve is a small but valuable protected area in the upper Rospuda River valley, near the town of Kotowina. Established in 2007, it encompasses over 3 hectares of wet meadows and a fragment of riparian forest. This area is distinguished by its rich herbaceous and shrubby flora, as well as the diversity of fauna associated with the river valley. The reserve is peaceful and rarely visited, making it a good place to rest during a cycling trip in the Suwałki Region. It's worth remembering that leaving the trails and interfering with nature is prohibited.