Take I-70 to the Minturn/Redcliff exit (#171). Follow the road until you cross over the big Redcliff bridge. After a little turn you will see a big parking area; park there. Directly across the road there is a dirt road leading up to the boulders.
The Classics
Mountain Project's determination of some of the classic, most popular, highest rated routes for The Kluttergarden:
Sean, when I lived in the area, I would head up there as early as possible, depending on the snow conditions of course. Usually there is a lot of snow, and it sticks around longer up there due to shade and elevation. Summer kicks ass up here, but right now should be late enough to go check it out. Wolcott is a good substitute until The Garden dries out.