M-20 B/C Ranger
Flight Crew Private
Flight Crew Last 90 Days 12; Flight Crew Total 933; Flight Crew Type 469
Distraction; Situational Awareness
Airspace Violation All Types; Conflict Airborne Conflict; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Object
Flight Crew Became Reoriented
Airspace Structure; Environment - Non Weather Related; Human Factors
I was distracted by an outside object; a balloon (maybe); a potential flight risk/ hazard.  Near north end and slightly west of Lake Sammamish. I exceed the floor of Seattle's class Bravo airspace by about 300 ft. or so; the floor is 3;000 ft. After clearing potential conflict; I descended to a suitable altitude below Seattle's Class Bravo airspace.
Mooney M20C pilot reported an airspace incursion while being distracted by a UAV (balloon).