Foster Island (Washington)

:See Foster Island (Ontario) for the island in the Canadian province of Ontario.

{{Infobox islands

| name = Foster Island

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| image = File:Foster Island, Washington Park Arboretum (48913815633).jpg

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| location = Union Bay

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| country = United States

| country_admin_divisions_title = City

| country_admin_divisions = Seattle

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| timezone1 = Pacific

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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.{{cite web | title=Duwamish Tribe: Chesheeahud| website = duwamishtribe.org | url=https://www.duwamishtribe.org/cheshiahud| accessdate=2019-07-30}}{{citation |title=Tribe cautions state on 520 bridge route | newspaper=Kitsap Sun |date=February 21, 2005 |url=https://products.kitsapsun.com/archive/2005/02-21/33440_tribe_cautions_state_on_520_brid.html}}