Next Thursday marks the 10-year anniversary of the conversion of 550 acres of dairy pasture into what West Marin now knows as the Giacomini Wetlands. A short walk from downtown Point Reyes Station, native grasses flourish and indigenous ducks bob where cows once roamed.

Ecologists say nature made surprising headway in just one decade. “What has been really rewarding has been how quickly it’s reverted,” said Lorraine Parsons, a park ecologist and the restoration project…