“Nathan Yau at FlowingData created maps tracing popular running routes in 22 major cities and San Francisco is one of them.”   As a runner, I’m not surprised to see my favorite route show up bold on this map;  it follows the Panhandle and into Golden Gate Park.

But The Bold Italic website (see link below) has looked at how this map was made in more detail and discovered that it relies on “public data from an app called RunKeeper. These visualizations are only representative of people who use RunKeeper, that is people with smartphones who download exercise tracking apps: a pretty small, specific demographic of the population. That probably explains why some of the less well-to-do areas of San Francisco are coming up blank.”  I’m thinking there should be a thick network of running routes heading into the park from all directions;  surely the park is a magnet for runners within a couple of miles at least.

via Looking for New Running Spots? Check Out This Map – The Bold Italic – San Francisco.