This is an area right off I-70. Pronounced "The Pukes" this aea is one mile east of Glenwood Springs in Glenwood Canyon. Park right off of the interstate on the east side of No Name tunnel going westbound. You will see the cliff up to the right of the tunnel. There are about 30 climbs here ranging from 5.8 to 5.14 one pitch.
Head North on Railroad Avenue and about a mile out of town on Highway 13 go right on highway 325, Go for several miles past RIfle Gap, and Rifle Falls and the road will head right there. Daily Use Fee of $5 or Parks Pass. This area is on the edge of the Flattops in the White River National Forest. The stream that runs through the Box Canyon here is pristine and use to be the site of a hatchery below. This is the main mecca for this region for climbing and can have heavy traffic. Some of the bad things of high traffic happen here so police yourself, pick up garbage, keep down the noise, etc. This area is renowned for it's amount of quality rock climbs, most of which are rated 5.12 - 5.13, but it does have easier routes like "Hot Potato". Camping is also available here for $7 - $12. For a complete guide for the routes here pick up "Western Sloper - Rifle Mountain Park" by Dave Pegg