Courthouse Wash Just above its confluence with the Colorado River. Beautiful upcanyon hiking trail into Arches, Utah National Park. Shuttle vehicle required. Utah Highway US 191 is southeastern Utahs main artery, interlinking beautifully sculpted canyons, breathtaking red rock formations, majestic snow-capped mountain peaks, rugged and colorful high desert beauty, geological treasures, mysterious prehistoric ruins and rock art, historic sites, a myriad of recreational opportunities and old-fashioned western hospitality.