Peavy Field is located on the OSU campus in Corvallis, OR at 30th & Jefferson. On football game days, many of the parking lots require payment for parking. Notify the official at the Peavy Field parking lot that you are there for the rugby match you will be allowed in.
Take the OR-34 exit (exit #228) into Corvallis. Stay on OR-34 coming over the bridge into town. Turn left on 4th St proceeding through downtown. Turn right on Western (noticing Reser Stadium on 26th). Turn right on 30th bringing you into campus. You will see the rugby field on your left.
For more detailed directions, please refer to google maps.