Any other senior citizens on here?

I'm Deb - age 63 Trying to keep the waistline and muscle tone but get sedentary in winter because of ice outside. I want to go on the Volks March at Crazy Horse Memorial in June 2015, but if I don't get off my fat *kitten* and get climbing up the hill near me for at least 30 minutes a day, I'm not going to be ready for the march. I also want to climb Harney Peak someday but it'll never happen if I don't get to some serious walking around town. Maybe accountability would be a good motivator.