How long to roast 30 pounds of red potatoes?

To roast 30 pounds of red potatoes, you should plan for about 1.5 to 2 hours at a temperature of 400°F (200°C). Cut the potatoes into uniform pieces for even cooking, and toss them with oil, salt, and any desired seasonings. Stir them occasionally to promote even browning. Always check for doneness by piercing with a fork; they should be tender and golden brown.