Reach Island, or Treasure Island, is an island in Case Inlet

Case Inlet

Case Inlet, in southern Puget Sound in the U.S. state of Washington, is an arm of water between Key Peninsula on the east and Hartstine Island on the west. Its northern end, called North Bay, reaches nearly to Hood Canal, creating the defining isthmus of Kitsap Peninsula. Case Inlet is the boundary...

 in the southern part of Puget Sound

Puget Sound

Puget Sound is a sound in the U.S. state of Washington. It is a complex estuarine system of interconnected marine waterways and basins, with one major and one minor connection to the Strait of Juan de Fuca and the Pacific Ocean — Admiralty Inlet being the major connection and...

 in the state of Washington, USA. The island's original name was Oak Island, but they later renamed it Reach Island due to its southern neighbor Stretch Island

Stretch Island

Stretch Island is an island in Case Inlet in the southern part of Puget Sound in the state of Washington, USA. It forms part of the unincorporated Mason County community of Allyn-Grapeview. The island has a land area of 1.2179 km² and a population of 119 persons as of the 2000 census...

. It forms part of the unincorporated Mason County community of Allyn-Grapeview

Allyn-Grapeview, Washington

Allyn-Grapeview is a census-designated place in Mason County, Washington, United States. The population was 2,004 at the 2000 census. The community-based monthly newspaper called the North Bay Review, services the Allyn-Grapeview area...

. The island has a land area of 0.36755 km² (90.82 acre

Acre

The acre is a unit of area in a number of different systems, including the imperial and U.S. customary systems. The most commonly used acres today are the international acre and, in the United States, the survey acre. The most common use of the acre is to measure tracts of land.The acre is related...

s) and a population

Population

A population is all the organisms that both belong to the same group or species and live in the same geographical area. The area that is used to define a sexual population is such that inter-breeding is possible between any pair within the area and more probable than cross-breeding with individuals...

 of 149 persons as of the 2000 census

United States Census, 2000

The Twenty-second United States Census, known as Census 2000 and conducted by the Census Bureau, determined the resident population of the United States on April 1, 2000, to be 281,421,906, an increase of 13.2% over the 248,709,873 persons enumerated during the 1990 Census...

.