See Foster Island (Ontario) for the island in the Canadian province of Ontario.
| Foster Island | |
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| Mapframe-Zoom: | 12 |
| Location: | Union Bay |
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| Country: | United States |
| Country Admin Divisions Title: | City |
| Country Admin Divisions: | Seattle |
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| Utc Offset1: | -8 |
| Timezone1 Dst: | PDT |
| Utc Offset1 Dst: | -7 |
Foster Island is an island in Seattle, Washington, USA's Union Bay. Bisected by State Route 520, it is part of the Washington Park Arboretum. There is a walking trail connecting Foster Island and the adjacent Marsh Island to mainland Seattle via a set of bridges and boardwalks.
Foster Island was once the Duwamish burial ground, Stitici, where the dead were placed in boxes tied up in the branches of trees.[1]