How long should my stock simmer?

If you have a pressure cooker this can be a great way to make stock in less time. I usually roast the bones and then throw in the vegetables and pressure cook my stock for 1 - 1.5 hours.

How long to simmer a stock depends on what kind. Chicken/turkey stock needs to simmer for quite awhile - 6-8 hours! Vegetable stock takes a lot less time (2 hours). You can make stock quite a ways in advance of using it - it freezes great (up to 3-4 months!) or will hold in the refrigerator for 3-5 days.

I usually keep mine at just below a simmer (180 F) for about 3-4 hours and then freeze it for use later. Here is one good guide: https://food52.com/blog/9739-how-to-make-chicken-stock-without-a-recipe