From Adidas North America's headquarters in North Portland to Under Armour's new digs at the old YMCA on Southwest Barbur Boulevard to Nike's mushrooming Beaverton campus, Oregon's athletic footwear and apparel companies are in frantic expansion mode. While Intel's planned downsizing has raised questions about the longevity of Oregon's economic boom, the sports and outdoors companies are scrambling to hire new employees by the hundreds.