Oregon landowners owe a minimal duty to trespassers:
Quote Quoting Denton v. L.W. Vail Co., 23 Ore. App. 28, 35, 541 P.2d 511 (1975)
"One entering or remaining on premises in the possession of another without a privilege to do so may hold the possessor liable for an injury suffered while on the premises only where that injury has been inflicted 'wilfully or wantonly.'"