The Grange Hall is located at 24707 Grange Hall Road, outside Philomath Oregon.
From Corvallis, take Highway 20/34 to Philomath. At the second light, turn left on 13th Street. Turn right on Grange Hall Road. In a little over a mile, Marys River Grange is on your right, just after crossing the bridge over Greasy Creek, and before Greengable Gardens.
You can also turn onto Grange Hall Road from Highway 34. The Marys River Grange is approximately 200 yards after the turn, just after Greengable Gardens.