The Green is a tributary of the Broad River, draining the southern slope of the Blue Ridge Escarpment in Henderson and Polk counties south of Asheville. The river is dammed twice - upstream at Lake Summit in Tuxedo and downstream at Lake Adger near Mill Spring - and the controlled release from the Tuxedo Hydro Station is what makes the whitewater predictable. Where the Chattooga and the Nantahala go bony in summer dry spells, the Green keeps flowing roughly 300 days a year. That reliability turned a regional river into a national whitewater destination. The Green is named for the deep green color of its pools - though after heavy rain it runs brown with sediment off the foothills.

The Upper Green is 3.7 miles of moderate water, an average gradient of 49 feet per mile, two Class III rapids, and a creek-like character that makes it popular for playboating - the freestyle discipline of whitewater kayaking. Below the upper run, the Narrows begin. Below the Narrows, the Lower Green opens out into six miles of Class II tubing water - the section every Asheville-area outfitter promotes as accessible adventure. The three sections share a watershed but might as well be different rivers. A family floating the Lower Green in inner tubes never sees what's happening upstream. What's happening upstream is what Wikipedia describes as 'pool-drop character' and 'boulder congested' - whitewater so technical that only seasoned Class V boaters even put on.

The Narrows drop more than 100 feet per mile. The Big Three rapids - Go Left and Die at 5.1, Gorilla at 5.2, Sunshine at 5.2 - are landmarks in southeastern paddling, the kind of features kayakers fly across the country to attempt. The river earned the names. Many paddlers have been injured here; three qualified Class V boaters have died on the Green over the years, and an incident on Sunshine left a kayaker paralyzed. These are not warnings paddlers ignore. The Green River Race, held annually since 1996, runs the full Narrows in a time trial followed by head-to-head heats. Many southeastern paddlers consider it the pinnacle of regional whitewater racing - the November Saturday is on every serious creek boater's calendar.

Helene came ashore as a Category 4 hurricane in Florida on September 26, 2024, then tore north into the southern Appalachians. Western North Carolina took catastrophic damage - flooding, mudslides, washed-out roads, hundreds of deaths across the region. On the Green, a landslide partially destroyed the powerhouse that controls water release into the Narrows. Worse for paddlers, the force of the storm physically rearranged the gorge. The Narrows that kayakers had memorized line by line for thirty years had a new course. The 2024 Green River Race was canceled. The 30th annual Green Race returned on November 1, 2025, on a transformed course - starting below Gorilla rapid, now altered beyond recognition, and running down to Rapid Transit. The river itself is finding a new equilibrium, and what it looks like and how it runs is still being relearned drop by drop.

The Green basin holds some of the highest floral and faunal biodiversity in the eastern United States. Deciduous forest cloaks the gorge walls - maple, birch, oak. Black bears live in the watershed. In 2018, two world-record fish were pulled from the Green by two different anglers: the V-lip redhorse and the notchlip redhorse, both species that exist nowhere outside the southeastern United States. The current North Carolina state record muskellunge, a 41 pound 8 ounce fish, was caught in Lake Adger in 2001. The Green moves between two impoundments, a hundred steep miles of southern mountain country, and a culture of paddlers, anglers, and tubers who all claim the same water. Helene reminded them they share it with the river itself.