Wild raspberries are often found in road ditches, tree lines, and generally wherever a open area meets a tree line. On my farm we have been propagating the wild raspberries because they bear such delicious fruit. Be careful as wild raspberries can have diseases so make sure to never propagate an diseased plant material.
If you aren't lucky enough to have tasty wild raspberries here are a few things to consider when planting your raspberry plants. Raspberries will grow in zones 3-9 and do well planted in rows 2-3 feet apart. Chose a few varieties so you can harvest berries all summer and into the fall. To get an optimal harvest pruning is needed as most berries come from 2nd year wood. In a few years your row of Raspberries will fill in nicely to make an edible living fence.
Raspberries have a very delicate fruit and are best eaten fresh but can be frozen as well. If you haven't eaten them all jam or jelly can be made. Raspberry leaves also make a great tea.
Raspberries can spread pretty quickly so once you have established a few canes they should provide you with berries for years to come.