This loop takes the intense fire road section of the Duckett Reservoir loop and returns via the bridle path or vice-versa. Sections of this route are used by local ultra runners for vert training as the fire road follows up the up and downs of the Patuxent River arteries. Many climbs can be 200' in 1/4 mile and are washed out or covered in scree. Both the fire road and the bridle path are hard in different ways. The loop gets humid in summer and muddy in winter. Navigation can be difficult in certain seasons due to fading trail markings.