This is the Corridor area that is at the Main entrance (East Side with the tourist center). Take the main creekside trail through the canyon for about 10-15 minutes. You will come to an large open area where there are a series of stairs and bridges. At the top of the first set of stairs (they head left and go down towards the river) there is a boulder with a trail heading towards the right and uphill. Follow this trail to the top of the cliffs and you should be able to find the boulders.
Awesome area, lots of good, fun beginner to intermediate climbs with great landings. Sorry for the funky directions but a map exists in Colorado Bouldering 2 and it is easy to find once you come upon the area.