NEW YORK — Going places? Vacations are more about pushing limits these days than tanning on a beach. And as travel adventures involving hiking, rock climbing, biking and kayaking become more and more popular, activewear designers are creating functional-yet-hip looks that cross over from the plane to the trail without a hitch. Here, Columbia Sportswear Co.’s nylon shirt and convertible skirt. For more, see pages 6 and 7.