Atlas

Colorado River

The Colorado River is the defining waterway of the American Southwest — 1,450 miles from the Rocky Mountain headwaters...

• Cataract Canyon
  Class II–IV+ 40 mi
• Cisco to Dewey Bridge
  Class I 16.1 mi
• Dewey Bridge to Hittle Bottom
  Class I 6.3 mi
• Meander Canyon
  Class I 48 mi
• Narrow Canyon
  Class I 7.5 mi
• Professor Valley
  Class I–II+ 13.8 mi
• Ruby–Horsethief Canyon
  Class I–II 25 mi
• Take Out Beach to Moab Bridge
  Class I 10 mi
• The Portal
  Class I 17 mi
• Westwater Canyon
  Class III–IV 17.2 mi

Green River

The Green River is the longest tributary of the Colorado River and the primary feeder of the Colorado Plateau's canyon...

• A Section
  Class I–II 7 mi
• B Section
  Class I–II 9 mi
• Browns Park
  Class I–II 18 mi
• Desolation Canyon
  Class II–IV 58.1 mi
• Echo Park
  Class I 2.5 mi
• Gray Canyon
  Class II–III 26.7 mi
• Green River Valley
  Class I 10.7 mi
• Island Park
  Class I 4.6 mi
• Labyrinth Canyon
  Class I 68 mi
• Lodore Canyon
  Class III–IV 18.7 mi
• Rainbow Park
  Class I 1.7 mi
• Split Mountain
  Class III–IV 8.3 mi
• Stillwater Canyon
  Class I 54 mi
• Swallow Canyon
  Class I–II 10.8 mi
• Uinta Basin
  Class I 100 mi
• Whirlpool Canyon
  Class II–III 8.4 mi

Yampa River

The Yampa River is the last major free-flowing tributary of the Colorado River — the only significant river in the...

• Yampa Canyon
  Class III–IV 46 mi