See the article and photos of the Top 25 here. Excerpt copied below:
The winner: Boulder, Colorado. Bolstered by a sense of community, access to nature, sustainable urban development and preservation policies, and perhaps even that clean mountain air, Boulderites overwhelmingly feel “active and productive every day,” according to Buettner’s research. Per capita, more people walk to work in Boulder than in any other city in the U.S. Low rates of smoking and obesity, and high rates of exercise, contribute to the satisfaction locals feel. Life is not always rosy in the Rockies—stress is on the rise; on average, 49 percent of locals surveyed reported feeling stress—but the qualities that keep Boulder on top make this city America’s happiest.
Here are a few additional photos of some happy-go-lucky folks in Boulder, chosen at random from hundreds of likely candidates:
This guy is my personal favorite.