Woke up late in the Grass Shack campground. Erik and the other guy camping here had left already, and we took our time getting going. It was nice to be up high and out of the heat of the low desert. Climbed a few thousand more feet up to Manning Camp, an old cabin turned Park Service weather station in the piney woods at the top of Mica Mountain. We walked through something like six different biomes in the 15 miles between the floor of the Sonoran Desert and the top of the mountain, and the views were awesome from the top. We worked our way down the other side to the park boundary where we camped in the oak forest. Met Levi, a friendly Albertan, as we were setting up camp.