what temp to cook roast
1 Reduce the oven temperature to 275 degrees F and continue cooking covered for another 2 hours. 2  Remove from oven and turn the roast over, place back in oven for another 1-2 hours or until roast is tender (could take longer than 2 hours, as you are cooking at a low temperature). Cover and cook at 350 degrees F for about 1 hour. 2  Uncover and place the carrots and potatoes around the roast. 3  Reduce the oven temperature to 275 degrees F and continue cooking covered for another 2 hours.