TOP-DOWN - ONE DAY. This 16 mile hike as a one day event is the most strenuous option. For athletic people who are very agile hikers. Best done May through September when days are longer. Usually a 10-14 hour hike for most athletes. Very scenic if you take time to look up. Permit required. Max group size is 12 persons. Starting Point is Chamberlain's Ranch.
TOP-DOWN OVERNIGHT. With the only disadvantage being the extra weight of overnight gear, this is the way to have the full Narrows experience. Spend one night under a blanket of stars in the canyon in one of 12 designated sites. Plan on hiking 6-8 hours each day with enough time to check out Deep and Kolob Creeks on day one, and Orderville Gulch on day two. Permit required. Max group size is 12 persons. Make sure to pack light (under 25 lbs.). Best time is May-September. Starting point is Chamberlain's Ranch, 1.5 hour drive from Zion Canyon.