The 606 Trail

You are walking seventeen feet above the street. Tree branches pass at eye level. Below, traffic waits at a red light, but up here there is only the click of bike wheels, footsteps, and birdsong. Back porches and rooftop gardens slide past on both sides. This is the 606, a park built on top of an old freight rail line, running straight across Chicago's Northwest Side.

The trail stretches 2.7 miles, about four and a half kilometers, along a raised earthen embankment. It links four neighborhoods: Wicker Park, Bucktown, Logan Square, and Humboldt Park. A dozen ramps connect it to the streets below. Runners keep to the soft shoulders. Cyclists roll down the middle. Everyone else drifts along the edges, watching the city from a height it was never meant to be watched from.

The story starts in 1873. The Chicago and Pacific Railroad laid tracks at street level along Bloomingdale Avenue. Factories grew up beside the line to be close to shipping. Trains carried lumber, coal, and finished goods through neighborhoods that were filling fast with immigrant workers, many of them Polish and German families employed in those same plants.

Street-level trains were deadly. Crossings claimed lives year after year, and the city demanded a fix. So in the early twentieth century, the railroad lifted its tracks onto this embankment. Bridges carried the trains over every cross street. The deaths stopped. And the trains kept running above everyone's heads for most of a century.

Then the freight faded. Trucks took the cargo, highways took the trucks, and by the 1990s only an occasional train rumbled through. Around 2001, they stopped altogether. The embankment fell silent. Wild grasses moved in. So did joggers and dog walkers, slipping up the slopes, using the forgotten line as an unofficial path.

Neighbors saw what it could become. Community groups began pushing the idea in the late 1990s, and Friends of the Bloomingdale Trail formed in 2003. The Trust for Public Land and the city joined the effort. Turning almost three miles of crumbling rail bed into a public park took more than a decade of planning, fundraising, and construction.

The trail opened on June 6, 2015. The name, the 606, comes from the ZIP code prefix every Chicago address shares. The choice was deliberate. The old rail line had divided neighborhoods that differ by income and language. The new park would carry one name that belonged equally to all of them.

The design team, led by the landscape architects Michael Van Valkenburgh Associates, kept the industrial bones. Old steel girder bridges still carry the path over the streets. But the top became a long, narrow garden. Thousands of trees, shrubs, and prairie grasses line the way, and the planting changes character every few blocks.

The views are half the point. The trail runs level while the city dips and rises around it, so you look straight into second-floor windows, across garages painted with murals, over fences into vegetable gardens. Church steeples rise ahead, then slide behind you. It is an honest cross-section of the city, one backyard at a time.

Watch the serviceberry trees as you walk. They were planted in long rows as a living experiment. Spring moves along this trail in a wave. Trees near Lake Michigan bloom days later than trees at the western end, because the lake keeps the air cool. The trail is long enough to see climate written in flowers.

At the far western end, at Ridgeway Avenue, the path climbs a spiral mound called the observatory. It was built for watching the sky, and people gather there at sunset. The mound rises in a slow coil, ringed with plantings. Looking back east on a clear day, you catch pieces of the downtown skyline stacked between water towers and rooftops.

The trail changed the streets around it. Home prices near the ramps climbed fast, and longtime residents on the western stretch felt the pressure. The 606 is loved, and it is argued about. Both things are true, and both are worth carrying with you as you walk.

For more than a century, this embankment carried freight: lumber, coal, the heavy business of a working city. Now it carries lighter cargo. Morning runners. School kids on bikes. Someone walking slowly, watching the serviceberries bloom. The line still connects things, the way it always did. It just connects them more gently now.