Notes
Started at the park entrance and ran the complete lower loop counter-clockwise. First half from entrance road to the Gregory House in 46:04. Second half from GH back to the entrance in total of 1:40:35 - about 8 minutes longer for the 2nd half. I have no idea if the halves are equal, but I doubt it. Feet and legs a little sore, but I don't run trails again for 6 days.
Next time I'm doing the upper "Challenge" loop for the first time, about 7.3 miles + distance to and from parking lot = about 8+ miles.
Oh, and "one trip, no falls".