The Ramblers Association now have a greatly improved website which is an exceptional rescource for all walkers, hykers and young families wanting to go for walks with young children. This site lists everything from historical walks to guided walks and really audious walks.
Find A Walk Near Me by Walking Britain is a truly excellent and free resource. Just enter where you are or where you would like to walk - and print out directions. The walks are graded and you can buy a specific map of the area at the same time. These are proper OS maps and weather proofed if required.
I always think of walking as one of the few activities you can do for free - and now you can with this guide!
Walking, Hiking and Outdoor Shops