The dig revealed two separate periods of occupation of the site, which is adjacent to the Sammamish River.

Many of the items were exhibited in the Marymoor Museum, which was at the park until King County evicted it 2002.

[2] In 2008, during a routine archaeological survey conducted as part of a stream restoration project, stone artifacts were discovered at Bear Creek, between Marymoor Park and nearby Redmond Town Center shopping mall.

In 2009–2014, more artifacts were discovered beneath a layer of peat, including stone flakes, scrapers, awls and spear points.

An announcement was made in 2015 that they were the oldest stone tools discovered in Western Washington, after the peat was determined by Carbon-14 dating to have been deposited 10,000 years ago.