Mary Bird Branch Trail is located near Triangle, VA. The trail is primarily used for hiking.
When added with some of the other trails in Potomac National Forest, it makes for a good hike. Short by itself, small uphill section (or downhill depending which way you are coming from). Relatively easy.
Short trail did in connection with Quantico Cascade. Didnt see any beavers, maybe they were busy.
Trail is pretty easy.