Garmin is such a good plan, but for next time I'm going to experiment with taping the directions to my bike frame. A mixte provides a rather good platform for it after all.
There are other models available, but I've used this one for years with great satisfaction. Definitely recommended if you're keen to do more longer rides.
Charlotte, you could try one of these:
http://www.bikeradar.com/gear/category/accessories/map-holder/product/mini-mapholder-09-34013
There are other models available, but I've used this one for years with great satisfaction. Definitely recommended if you're keen to do more longer rides.