Alcratraz is a high quality, super classic slot canyon in Robbers Roost. The entrance alone, a long free hanging rappel from your vehicle, is enough to warrant special attention. The narrows are deep, dark, and fun and the crux consists of thrashing over a tight constriction near the end. Oblivious to what had occurred in canyon country in early October 2010, Dominic and I descended Alcatraz after a 100 year flood and had quite a cold and creepy experience. It was great to go back and enjoy Alcatraz! On this day there were FIVE different vehicles lined up along the cliff for the initial rappel!!!