Durable cloth like canvas makes great game boards. They are easy to make, affordable, and store in less space than traditional boards. When making your own please consider the following tips.
After cutting your cloth to size use a sewing machine to stitch a border about a half inch from the edge of the cloth. After a wash in a washing machine the edge will fray up to the stitched border and no farther. This gives a nice rustic edge that lies flat.
Try adding grommets so that you can tie the board down on a windy day.
You can draw the game board with a permanent marker. However, try using paints, embroidery, or even appliqué to decorate it and make it unique.