Boundary Trail / Little Gunpowder Trail (blue / White) is a hiking, biking, and horse trail in Harford County, Maryland. It is within Gunpowder Falls State Park (Sweet Air Area). It is 0.5 miles long and begins at 505 feet altitude. Traveling the entire trail is 0.8 miles with a total elevation gain of 111 feet. The Gunpowder Falls State Park (Sweet Air Area) information map is near the trailhead. There are also benches, a parking, and a shelter.
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