An open house and tours of the former Trillium Woods property will next week, sponsored by the Whidbey Camano Land Trust.

The land trust has purchased an option to buy the 664-acre property between Greenbank and Freeland. It’s the largest private single-owner parcel of forest land remaining on Whidbey Island.

Three Snohomish County banks bought the property after foreclosing on the developer. The land trust is trying to raise $4.2 million by June 10 to secure the property with a conservation easement.

If the land trust fails to raise the money, the property likely will be sold off in chunks, said Pat Powell, land trust executive director.

More than 50 local organizations and businesses have endorsed the grassroots campaign.

The open house will be from 4 to 6 p.m. Wednesday, May 12, at the Land Trust office, Barn C-201 at Greenbank Farm, 765 Wonn Road. Tours are scheduled for 3 p.m. and 6 p.m. Friday, May 14, and will start from the land trust office.

“Because the property is private and gated, it’s been challenging for the public to experience the land and fully appreciate why we’re working so hard to save it,” Powell said.

To donate or to learn more, visit www.savetheforestnow.org or send your donation to the Whidbey Camano Land Trust, Attention: Save the Forest Now, 765 Wonn Road, Barn C-201, Greenbank, WA 98253.