Green River headwaters are in the Wind River Mountains of western Wyoming, flowing through spectacular canyons in Wyoming and Utah, with 40 miles inside western Colorado.
Much of Green River flows through desolate areas in remote canyons, some accessible only by boat, many are not identified on maps. Some canyons are lost, buried under water after the Flaming Gorge Dam was built.
Surviving canyons we have been able to identify include Hideout Canyon, Red Canyon, Canyon of Lodore, Whirlpool Canyon, Split Mountain Canyon, Desolation Canyon, Gray Canyon, Labrynth Canyon, and Stillwater Canyon; we probably missed some along the way (the map simply identifies
Majestic Canyons), Gates of Ladore [Canyon of Ladore], and Labrynth Canyon.
There is a lot of confusion about the name of this road, listed on various maps and web sites as Mineral Bottom Road, White Rim Trail, BLM 129, Horsethief Trail, and Shafer Trail. And it is not the only way in or out - a 2-day trip on other trails/roads. more info and photos are in the White Rim Trail menu selection. The combined length of Gray and Desolation Canyons south of Green River, Utah, is 120 miles, with no road access. At one point the rim of the Tavaputs Plateau is 5,000 feet above the river. The only direct access to the river at Mineral Bottom between Labrynth and Stillwater Canyons is the Mineral Bottom Road (often called the White Rim Trail, listed as one of the most dangerous roads in the US - see its menu option). South of Mineral Bottom, Green River enters Canyonlands National Park in Stillwater Canyon and flows through the park to its confluence with the Colorado.
Parks and recreation areas along Green River include Fontenelle Reservoir, then end-to-end Flaming Gorge National Recreation Area, Browns Park National Wildlife Refuge, the Gates of Lodore, Dinosaur National Monument, and Green River State Park. Flaming Gorge (illustrated in the banner photo) was named by Wesley Powell after seeing the sun reflecting off the brilliant red canyon walls.
The United States Geological Survey In early river history, Green River emptied into Grand River, which, at its confluence with Little Colorado River at the eastern end of the Grand Canyon, became Colordao River for the rest of its journey to the Gulf of California. At 730 miles (1,175 km) in length, Green River is significantly longer than the Grand, and its drainage area is 70% greater than the Grand. Grand River was renamed Colorado River in 1921, ignoring the protests of the states of Wyoming, Utah, and Arizona, and the USGS, who names rivers by the longest tributary.
Island in the Sky is one of four districts in Canyonlands National Park, in the triangle created by the canyons of Green and Colorado Rivers. It has three geologic levels - Island in the Sky, which is surrounded by the White Rim (hence the White Rim Trail around it), which is bounded by Stillwater Canyon (Green River) and Meander Canyon (Colorado River). View Photos is an auto-show of photos in the Photo Gallery, White Rim Trail explores trails and roads around Island in the Sky and White Rim.