Labor Day Pasture Roping & Western Weekend. Brewster Ranch is home to the Bushyhead Pasture Roping and Barrel Race, and it’s on again this year at Brewster Ranch in Bristow. Look also for World Series team roping, mounted cowboy shooting, a trade show and a trail ride with the American Quarter Horse Association. A portion of the proceeds of this event will go to the Clem McSpadden OSU Animal Science Endowment Fund. Find it Saturday out at Brewster Ranch in Bristow.