Ranger Thoughts 2011 - Rocky Mountain National Park (U.S. National Park Service) NPS Photo by Ranger Chelsea. November 16, 2011. The Trough is a gully filled with loose rock that climbs about 1,000 ft in a ½ mile. You literally need to use your arms, legs, knees and even your butt to get to the top. This was probably the most difficult part of the climb for me. Now and again I was distracted from difficulty when I saw the mountains below me splashed with the light of a new day. The climb is both physically and mentally exhausting, but yet all I could think about was making it to the top. The best smelling flower found at lower elevations is the wild rose. This rose is a five-petaled pink flower with a yellow center, and it grows on large shrubs (2-3 ft. tall). The scent of this flower is absolutely intoxicating, and it's no wonder that swarms of pollinators are never too far away.Another bug that uses this flower is the crab spider. It has very good camouflaging capabilities, and will lie motionless within a flower for days at a time waiting for its prey. The front two legs of the spider are often larger and stronger than the other six, are held sideways, ready to catch the prey as it lands in the flower. The poor bees and butterflies that are lured in by the yummy smell of the wild rose have no idea what's coming, until they become the crab spider's next meal.