The Iron Horse Regional Trail spans 32 miles from Concord south to Pleasanton, according to the East Bay Regional Park District. More from CBS News Arson suspect arrested in SF Outer Richmond ...

The Iron Horse Regional Trail stretches about 30 miles, starting at Marsh Drive just south of state Highway 4 in Concord and running through Pleasant Hill, Walnut Creek, Alamo, Danville and San ...

Initially, the trail along an 1891 railroad right of way was largely seen as a path for hard-core hikers, cyclists and occasional horse riders. But the 32-mile trail from Highway 4 in Concord to ...