Through a two-hour lecture/discussion April 25 from 6:30pm to 8:30pm and six-hour Saturday tour (with lunch) from 9:00am to 3:00pm, local probate judge and historian Quentin McGown will lead an exploration of the history and evolution of the Trinity River and its role in the development of Fort Worth and Tarrant County. The river has become the centerpiece of North Texas flood, recreation and greenbelt preservation planning efforts. Together, we'll take a historical perspective on how we've used—and occasionally abused—the…