Augustin Stables’ Rainiero extended his winning streak to four when he pulled away to a 14 1/4-length victory in the feature race of Sunday’s 45th annual High Hope Steeplechase at Lexington’s Kentucky Horse Park.High Hope Stables’ Tizallaboutme, trained in Camden by Arch Kingsley, who had Willie McCarthy up, finished second in the $20,000 starter allowance for horses which had run for a claiming price of $20,000 or less in 2011 or this year. Manown Kisor’s Sumo Power took fourth. Rainiero, a 10-year-old gelding who was bred in Chile, ran the hurdle race’s 2 1/8 miles in 3:59.60.Trained by Richard Valentine, Rainiero was ridden by Matt McCarron, who collected his 202nd career victory.