Photo #5794 - San Juan River Bridge, Utah The San Juan River, Utah a major tributary of the Colorado River, winds and snakes through Navajoland. Superb Anasazi ruins and Indian rock art along the river between Bluff, Utah and Lake Powell, Utah. 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.