Daniel Hernandez and I will co-lead this long but pleasant 13-14 mile loop hike, which starts at the Seneca Bluffs trailhead parking on route MD-28. We will hike south on the Seneca Bluffs Trail and continue to the Potomac River. Lunch will be at or near the Potomac. After lunch, we will hike north on the Seneca Greenway Trail and return to the MD-28 parking lot. This hike has some nice view of Seneca Creek and the Potomac. The trails…