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Gallagher Hill Open Space

Green Marker
47.578625 -122.216849
Mercer Island, WA 98040 (King County)
Join us while we partner with the City of Mercer Island to build a new trail through Gallagher Hill Open Space. The 11 acre natural area is part of Mercer Island's open space system.  This new trail will serve as an important connection between SE 36th Street and E Shorewood Drive, encouraging pedestrian access through the area and increasing walkability around the island.  Work will include surfacing the trail, clearing brush and constructing drainage features.

Upcoming Volunteer Opportunities

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The Greenway is Hiring!

See our Volunteer & Outreach Coordinator/Manager position.

Join our Trail Crew: Lead, Assistant Lead, and Crew Member positions available.

Lead our summer camps: Lead Educator positions available.

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Greenway National Heritage Area