Hiking trails can provide a day of fun and rewards. Benefits include personal adventure, healthy exercise, bragging rights and fresh landscape views not seen from the highway. With any adventure, you may encounter or experience some form of obstacles. Each season park personnel take part in dozens of rescue operations. Cases involve visitors with heat exhaustion, dehydration, and sometimes injury. Inexperienced hikers can occasionally lose sight of an established trail, and during some extreme conditions there are those caught in flash floods. In some cases, hikers find it was much easier to ascend than descend a steep trail or slickrock face. Expert advice stresses that casual hikers stay on trails that are marked with cairns, take sufficient amounts of water, protect fragile environments, leave no trash, and allow enough time for a safe return. Last and most important, respect sudden weather changes, the unpredictability of lightning and the power of rushing water.