How long to roast an unstuffed 22.5 lb turkey with no foil tent?

To roast an unstuffed 22.5 lb turkey without a foil tent, you should plan for approximately 4 to 4.5 hours at 325°F (163°C). It's important to check the internal temperature, which should reach 165°F (74°C) in the thickest part of the breast and thigh. Let the turkey rest for about 20-30 minutes before carving to allow the juices to redistribute.