Gunpowder Falls North and South Loop Trail is a 13.3 mile loop trail located near Parkton, Maryland that features a waterfall and is rated as moderate. The trail is primarily used for hiking and fishing and is accessible year-round.
Directions from Baltimore, MD: Travel Interstate 83 approximately 15 miles north to the Hereford exit. Travel west of State Route 137 / Mt. Carmel Road about 1 mile. Turn right (north) onto Masemore Road to reach trailhead parking in 2.5 miles.
It was nice, did the south trail only. There are no bridges across any of the water. There may have been at one point but not anymore. We had to ford the river on foot on the return. Still a good hike.
Only done the part from masemore road into the base of the dam, but it was a worthwhile, light hike, a little wet in places in early spring.
Attn: there's no bridge left to traverse the river and use the south loop, so you'll have to do out and back.