After 10 years and $10 million, the Northern Virginia Regional Park Authority has completed the 44.5-mile W&OD Trail, one of the East's longest paved bicycle trails.

The newly-opened nine-mile section from Leesburg to Purcellville is the most scenic -- tree-lined, with views of the Blue Ridge Mountains. Passing under a 19th-century stone bridge are George Delcher (left) and Carlton Combs, both of Falls Church.

A W&OD celebration, with music, clowns and pony rides for children, will be held Saturday starting at 9:30 a.m. at Loudoun Valley High School, beside the trail in Purcellville.

The W&OD also has a 30.5-mile parallel horse path from Vienna to Purcellville.

The park authority plans to extend the W&OD seven miles farther to Bluemont and the Appalachian Trail.

The park authority plans to extend its W&OD Trail to Bluemont and the Appalachian Trail, which follows the border between Loudoun County and Clarke County.

A 30.5-mile bridle path now parallels the bicycle trail from Vienna to Purceville.

A new bicycle bridge over the George Washington Memorial Parkway and the new extension of the Mt. Vernon Bike Trail, which opens this month, will link Virginia and District bike trails.

The W&OD Trail branches into two segments, one following I-66 and one following Four Mile Run. Both connect with the Mt. Vernon Bike Trail.

The extension of the W&OD Trail from Leesburg to Purceville (A to B) is now complete. The northern part of segment C-D is planned for construction within the next few years. Segments B-E, F-I-G, and H-I are anticipated for the future.