The Vashon-Maury Island Land Trust will host Bill Fisher Day at Fisher Pond from 2 to 4 p.m. this Sunday.

Twenty years ago, Fisher donated his pond and 90 acres to the Land Trust. Sunday’s event will honor his gift and celebrate the role it plays in this community, complete with nature activities and — the main feature — pie and ice cream.

“Pie was Bill’s favorite,” said Land Trust Executive Director Tom Dean.

Both the Vashon Wilderness Program and Vashon Nature Center will lead nature activities, as will Barb Gustafson, who used to lead all of the Land Trust’s education programs. Vashon Audubon will also be there with the group’s birding scope. In some ways, Dean said, the event will be a celebration of how much outdoor education has grown on the island since Fisher donated his land.

The Land Trust has also created a short video documenting the events of 20 years ago; it will be shown at Sunday’s event.

When Fisher donated the land, it was his dream to connect the pond to Agren Park, Dean said.

“It is still part of our plan. We are not quite there yet,” he added.

Dean noted that originally the trail on the property went only around the back of Fisher Pond, but the Land Trust has extended it around the pond and also created legs that go out to Cove Road and toward Agren Park, more than doubling the trail length.

Several acres of one section of the property were once home to blackberry and Scotch broom, Dean added. People had previously tried to plant trees there and were not successful, but the Land Trust has reestablished a forest there.

“It was one of our early restoration projects, and it has been quite successful,” he said.

Twenty years after Fisher donated the land, it remains the largest individual donation the Land Trust has received and has grown from Fisher’s 90 donation to 150 acres. It is Vashon’s largest open-water pond and one of the top island birding spots, according to the Land Trust’s website. The pond also forms the headwaters of Shinglemill Creek.

In the early years after Fisher donated the land, Dean said the Land Trust held Bill Fisher Day celebrations, but it has not held one since 2002. Now, at the 20 year mark, it was time to do so again.

As for Sunday’s pies, volunteers are making them, but more would be received gratefully.

“If people want to bring a pie, they would be very welcome,” Dean said.

For more information, see www.vashonlandtrust.org.