At its deepest, the Black Canyon reaches 2,700 feet down into southern Colorado. Some climbing routes require a 2,000-foot rappel with a 5.10, 12-pitch climb out, and rapids start at Class V (good luck, kayakers). So hike about a mile down Chukar Trail with a fly rod in hand: You'll feel like you're in an underground Shangri-La, and the dry-fly fishing is spectacular (blackcanyonanglers.com). Afterwards, crash 20 miles downstream at Black Canyon Anglers' 20-bed fishing lodge, nestled between sandstone cliffs (from $80 per night).