Nestled 20 feet below street level in an early 20th-century railroad cut, Minnesota’s Midtown Greenway bypasses the street traffic crossing overhead on more than two dozen historical bridges.

One of the largest completed sections of that developing network is a pair of connected rail-trails—the Heritage Rail Trail County Park and the Torrey C. Brown Rail Trail—a 44-mile expanse.

The 150-mile Great Allegheny Passage is the July 2007 Trail of the Month, connecting Cumberland, MD to McKeesport, PA, with C&O Canal Towpath.