Break-time ends and we leave the grove of trees. Our GPS units take us back out into the open, back out under the sun. The scenery begins changing again as we find ourselves scrambling up the side of an arid rocky hill. The pines and cottonwoods are gone, replaced by creosote bushes and rocky mountain juniper. The hill is very steep now and I turn my attention to the ground. A cactus! Not just one, but dozens of petite, ankle-sized cacti hide all around. Some species are even flowering. I make a mental note to warn all future Croc-wearers who wish to complete the course. Forests and deserts, what next?