This family-friendly trail system in Zion National Park visits a series of pools and small waterfalls set among red sandstone cliffs. The Lower Emerald Pool Trail (1.2 miles round trip) is mostly paved and leads to a collection of small pools beneath dripping springs. The slightly steeper Middle Pool adds 0.2 miles each way, while the more strenuous Upper Emerald Pool Trail continues to a larger pool nestled beneath massive 300-foot cliffs. Combining all three pools creates a 3-mile round trip that showcases Zion's diverse scenery, from lush hanging gardens to towering canyon walls.