The 606, also known as Bloomingdale Trail, is a one-of-a-kind, linear, elevated, public park, converted from the old Bloomingdale Line—a retired section of the Chicago transit system that runs east-west through the Logan Square, Humboldt Park and West Town neighborhoods (originally built in 1837). The 606 brings together arts, history, design, trails for bikers, runners, and walkers, event spaces, alternative transportation avenues, and green, open space. The 606 extends 2.7 miles along 1800N, between Ashland (1600W) and Ridgeway (3750W). There are twelve access points, one approximately every quarter-mile.