Mayor Martin O'Malley will preside over a ground-breaking ceremony Friday for the Jones Falls Trail, a long-planned greenway for bikers, walkers and joggers.
The trail eventually will travel through 20 neighborhoods that lie near Baltimore's central stream valley, which empties into the Inner Harbor.
Funded with $1.3 million in federal transportation money, the first leg of the 10-foot-wide asphalt trail will connect Druid Hill Park and Pennsylvania Station to encourage use of alternate modes of transportation for work and recreation. It will pass the Baltimore Streetcar Museum on Falls Road.
City planners expect the trail to extend 10 miles eventually, as far north as Robert E. Lee Park north of the city line.
In public meetings leading to Friday's event, planners have said they hope to make Baltimore more of a bicycle-friendly city and to connect the city's neighborhoods.
The project is running about a year behind schedule.
The ceremony Friday is set for 11 a.m. at the main parks and recreation building, 3001 East Drive in Druid Hill Park.