Frederick, MD – Frederick County, Maryland now boasts a long-distance path through the northern Blue Ridge Mountains on the border of the Washington, DC. metropolis. New signage marks the high ground hike-bike-horseback path, which outdoor enthusiasts give steadily increasing usage. With the understated name Blue Trail, the path extends 16 miles. It connects two state parks, Cunningham Falls and Gambrill, and runs through the extensive Frederick Watershed. From the city of Frederick, Route 40 west approaches the trail at Gambrill State Park.