Trail surface: grass and mud, have had a lot of rain this year. Bugs: we did the three mile Outer Loop and almost turned back due to swarms of mosquitoes, also found ticks on me and my husband when we got home. Scenery: Really beautiful, but not much variation, wooded areas, grassy areas, wood bridges and river. Elevation gain: even though map claims some elevation feels essential flat. Amenities: Visitor Center very nice, restrooms very clean, staff very friendly, drinking fountain outside building, ample parking. Overall a lovely hike but mosquitoes a huge problem.