The Flumes (aka Tilting Terrace) area offers a ton of fun, safe (?), bolted routes 10 minutes from the parking lot. Grades range from 5.7 to 5.10 (but don't bother with the 5.7 routes). With great names like Kibbles and Bits, Jumangi, Bits 'n' Pieces, and Nipples & Knobs, how could you not check it out? All routes can be rappelled using a single (60M) rope.