Arcata, California - The Green Address: Spend enough time in bike-friendly Arcata, on Cali’s foggy northern coast, and you’ll develop Popeye thighs like the locals in this über-liberal community, where recycling is religion and the Green Party rules. The riding selection is as broad as the virgin trees in nearby Redwood National Park, from the gentle new 5.5-mile Hammond Coast trail to the surprisingly technical dirt in Community Forest, a Central Park–size preserve.