(Washington County, OR)  --  A Portland man is hospitalized following a serious motorcycle accident last night at Henry Hagg Lake.  Washington County sheriff's deputies say they were called to the scene, near Southwest Scoggins Valley and Nelson Roads, shortly after 7 p.m.  They believe the man, identified as 26-year-old Uziel Guzman-Avendano, was riding around the lake with friends at a high speed when he missed a turn and slammed into a guardrail.  He was airlifted to a Portland hospital with injuries that may be life-threatening.