Then there's the active local population that pours their leisure time and dollars into mountain biking, skiing and nightlife.

FORBES: Magazine Article

If I had to guess, I would say it is a safe bet that biking to work will increase even more next time Bloomberg looks at the topic.

FORBES: 5.44% of Portland Workers Bike to Work

Cycling has continued to be popular in Europe as a legitimate form of transportation ever since, but here in the States, it's something to be done in your down time, often in the form of racing or mountain biking.

ENGADGET: Engineering a better bicycle with DBC City Bike Design Alt

They know that ambling through the countryside on a weekend afternoon carries an intolerable opportunity cost: the time could be so much better spent on greater things, such as whitewater canoeing or off-road biking.

ECONOMIST: America��s great trek