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Mary Olson Farm

28728 Green River Rd SEMaryOlsonFarm
10 acres plus 50.61 acres in open space land

The Mary Olson Farm has a seasonal schedule. For current information about open hours and activities, please visit the White River Valley Museum website.

The City applied for and received King County Conservation Futures funding to purchase the historic Mary Olson Farm in 1993. The funding stipulates that the Farm can be developed for passive recreation and open space use only. The 60-acre Farm is on the National Register of Historic Places, and is a King County Landmark property. The private canyon in the center of the farm includes a farmhouse, large barn, a weaving house, and several other out buildings surrounded by forested hillsides and two meadows. The Mary Olson Farm is the most intact 1880s family farm in King County. The buildings and to some extent the landscape require extensive restoration. The buildings have been restored by the White River Valley Historical Society.

The Farm includes many important historic features: a wagon road; six historic buildings, an heirloom orchard; two salmon runs in Olson Creek; two meadows; all surrounded by forested hillsides. The City intends to restore the Farm and its environment to use as a living museum attracting school groups and members of the general public. The wagon road will be able to connect area trails and bicycle routes in the area. In 2000 an award winning Master Plan was developed for the Farm, and in 2004 an Operations Plan was developed, creating a year by year plan leading to full program offerings and public access in 2014.

Park Features:

  • Historic Farmstead
  • Meadows
  • Bluff and Creek

Park History

Named after the descendants from the early settler family who purchased the land in 1879. The land was purchased in 1993.