Per LB CAD
Ultra hops have traditionally only been grown only in the United States and even then in somewhat limited qualities. They were developed in Oregon in 1983, released commercially in 1995 and are a triploid variety rich in humulene, giving them a mildly spicy aroma and flavor.
A combination of four parts Hallertau one part Saaz and one part an as unnamed varietal, Ultra is well suited to lagers, pilsners, wheats and bocks both for finishing and aroma. Ultra also features an almost identical oil profile to Hallertau Mittelfrüh.
Descriptions provided by the awesome Hopslist.com