Walking Strong through the Years

Lifelong Fitness Alliance provides training to be a Fitness Ambassador so you can coordinate 10-week walking programs. The group began at Stanford and appears to be very active in the San Francisco area.
America on the Move also gets communities on their feet to fight obesity and other health problems brought on by inactivity. They have a few simple rules: Walk more, eat less; get a group involved; use weigh-ins and pedometers to make progress tangible; find pleasant walks near home; look for fun activities like hiking and dancing; walk at sunset or sunrise and dress appropriately for the weather; and use healthful rewards like new walking shoes, fresh fruit or walking to an outdoor cafe.