This 10 mile hike in Columbia heads north from Robinson Nature Center and requires a wet crossing of the Middle Patuxent River on our way to the Middle Patuxent Environmental Area (MPEA) and another crossing of the river in a different spot on our way back to Robinson. Expect 500’ of elevation gain at a modest pace of 2.0 mph. Be prepared for a couple of miles on unmaintained trails, and a few overgrown sections requiring bushwhacks. The access points…