how long should i roast a pork tenderloin
1 Place pork tenderloin in roasting pan. 2  Roast for 30 minutes. 3  Turn the pork over and roast for another 25 minutes. 4  The pork tenderloin is ready when the internal temperature reaches 145 degrees Fahrenheit (63 degrees Celsius). Roast for 30 minutes. 2  Turn the pork over and roast for another 25 minutes. 3  The pork tenderloin is ready when the internal temperature reaches 145 degrees Fahrenheit (63 degrees Celsius). 4  Remove the pork from the oven and allow to rest for 10 minutes before serving.