Colossus contains a large collection of boulders in varying quality, plus some of the best route potential on the cliff lines. The Puppy, a large obvious pillar at the south end of the cliff line, has a cool overhang and a nice looking dihedral, awaiting routes. Other cracks and a cool pinnacle await. You have to hunt for the better boulders, but there are some nice ones with steep faces or overhangs, and quality rock.