3-Day walk. Build your mileage so you can walk 20 miles per day for three days. Suggested Training Schedule for the Breast Cancer Walk.
I have registered for the Susan G. Komen Breast Cancer 3-Day Walk in Chicago in August 2008. I believe there are some training guidelines.
Even runners need a bit of transition time to go to a 3-day walk, which can total 60 miles. Your Training Plan For A Breast Cancer 3-Day Walk.