I am signed up to do the Avon Walk for Breast Cancer (39 miles in 2 days - walking) and I will be almost 15 weeks at the time. I have done it every year for the past 6 years. I am very active - work out 6-7 days a week and have continued to do so while pregnant (but at a lower intensity). My doctor said I should be fine, but probably won't feel like doing it at the time. I wanted to see if any moms out there have done anything like this during past pregnancies and how they felt! Thanks!