Union Bay Natural Area

Union Bay Natural Area is a restored natural landscape spanning 74 acres along Lake Washington, combining grasslands, wetlands, and shoreline into one connected space. The site is accessed through several graveled paths, including the Loop and Wahkiakum Lane trails, with entry points near the Center for Urban Horticulture.

This site emerged from the Montlake landfill, which operated as a dump until 1966, and was transformed into a protected natural area through extensive restoration work. The conversion of this former waste site demonstrates how degraded land can be rebuilt into functioning ecosystems.

The University of Washington uses this area as a learning space where students and researchers observe natural processes and ecosystems in action. You will often see groups conducting field studies or documenting the wildlife and plants that live here.

The best times to explore are early mornings or late afternoons when wildlife is most active and light is most pleasant. The paths are open anytime, but sturdy footwear is recommended due to uneven ground and muddy sections during wet seasons.

More than 200 bird species use this area, which represents the second-largest natural system on Lake Washington. This bird diversity makes it one of the best spots in the region for watching different feathered species throughout the seasons.