Less than 500 ft over private property is legally considered trespassing.
I respectfully disagree...as a fellow Oregonian.
ORS837.300-.998
Specifically examine ORS 837.380 (2) and (3):
837.380 Action by owner of real property; Attorney General. (1) Except as provided in subsections (2) and (3) of this section, a person who owns or lawfully occupies real property in this state may bring an action against any person or public body that operates an unmanned aircraft system that is flown over the property if:
(a) The operator of the unmanned aircraft system has flown the unmanned aircraft system over the property on at least one previous occasion; and
(b) The person notified the owner or operator of the unmanned aircraft system that the person did not want the unmanned aircraft system flown over the property.
(2) A person may not bring an action under this section if:
(a) The unmanned aircraft system is lawfully in the flight path for landing at an airport, airfield or runway; and
(b) The unmanned aircraft system is in the process of taking off or landing.
(3) A person may not bring an action under this section if the unmanned aircraft system is operated for commercial purposes in compliance with authorization granted by the Federal Aviation Administration. This subsection does not preclude a person from bringing another civil action, including but not limited to an action for invasion of privacy or an action for invasion of personal privacy under ORS 30.865.
(4) A prevailing plaintiff may recover treble damages for any injury to the person or the property by reason of a trespass by an unmanned aircraft system as described in this section, and may be awarded injunctive relief in the action.
(5) A prevailing plaintiff may recover attorney fees under ORS 20.080 if the amount pleaded in an action under this section is $10,000 or less.
(6) The Attorney General, on behalf of the State of Oregon, may bring an action or claim for relief alleging nuisance or trespass arising from the operation of an unmanned aircraft system in the airspace over this state. A court shall award reasonable attorney fees to the Attorney General if the Attorney General prevails in an action under this section. [2013 c.686 §15; 2015 c.315 §11; 2016 c.72 §10]
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Flying under Part 107 you should be good to go in Oregon...and if someone interferes with your operation they can be charged with a Class C felony under Oregon Law (ORS837.995(2))
One more reason to be a Part 107 pilot!
Fly safe!