This is a canyon probably best known for its splendid fishing as the South Platte River drains from Cheesman Lake to Strontia Springs Reservoir and then down into the lower canyon. It has biking opportunities, hunting resources, some rock climbing, and even a bit of ice climbing. Most will not find the abundance of large faces so plentiful in other canyons, but for the discerning eye, there are climbs here to be done. A bike can be useful for the approaches.
George, perhaps you can search your files and fill in some more details. Thanks!
From Denver, you can get to lower Waterton Canyon via C-470 on the SW side of town. Go south on CO 12 (Wadsworth) until it becomes Waterton Rd. Shortly thereafter, there is a parking area on the east side. Park here, and then hike or bike into the canyon.
To access the upper Waterton Canyon area, you can go west on US 285, to Pine Junction. Head south on CO 126 past Pine to Foxton Rd. and head east. The road crosses over the South Platte River at a bridge. Hike downhill.