Reach Island, or Treasure 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 0.36755 km² (90.82 acres) and a population of 149 persons as of the 2000 census.
References
- Reach Island (Treasure Island): Blocks 6026 thru 6028, Census Tract 9604, Mason County, Washington United States Census Bureau
