Porcupine Rim is one of the top trails in the world to come and ride. Starting at the UPS/LPS juncture within five minutes riders will enjoy views of the epic Castle Valley and the Colorado River that films and people from everywhere travel to see. Not to mention the famous fast downhill flow with both blue intermediate technical rock features and playful black expert rock challenges that can be walked or shown how to be ridden. This is the most scenic and, in our opinion, includes what are the best and most world renowned parts of the Whole Enchilada making it accessible for a half day tour.