There's no definitive answer to this question as it largely depends on personal preferences and opinions. However, there are some cities that tend to be more popular among athletes and outdoor enthusiasts. These include Boulder, Colorado; Portland, Oregon; Seattle, Washington; San Francisco, California; and Anchorage, Alaska. These cities offer a variety of activities for people who enjoy being active, from hiking and biking trails to skiing and snowboarding resorts. If you're looking for a place to live that will allow you to stay active and fit, one of these cities might be a good option for you.