Stonebridge-Terrill Preserve protects 59 acres of meadow, wetlands, and forest. Used historically for agriculture, a portion of this land still yields hay for island livestock. The preserve provides varied habitat for wildlife, retains stormwater, and helps recharge aquifers. A short trail into a forested wetland and wildlife observation area is open year-round. The mowed portion of the preserve is open to the public following mowing in late summer with walk-in access from the adjacent county roads. A portion of the field is also used occasionally by the Orcas Radio Control Aircraft Society.