Laurens’ Ric Brockway Challenges Kathy Clark By JIM KEVLIN LAURENS – Ric Brockway is used to climbing mountains. At 60, he put on a backpack and hiked the 120-mile Northville-Placid Trail through the Adirondacks. Two years ago, at 70, he climbed the 35 tallest Catskills, winning membership in the 3500 Club. This year, he’s taking on another challenge: Running against former county board chair Kathy Clark, R-Otego-Laurens, in the June 25 Republican primary. With his wife, Laurens Town Justice Patricia…