Two rivers merge beneath a billion years of rock. Then the canyon gets serious.
Cataract Canyon begins where the Green meets the Colorado, deep in Canyonlands. Above the rapids, there’s time. Time to watch the walls change, follow a side canyon farther than you meant to, linger while evening light climbs the cliffs. Downstream, Mile Long and the Big Drops wait. That anticipation follows you into camp, even on the quietest evening.
Major landmark near the Confluence and Doll House access. Important layover, ranger, and route-logic node.
Rapid 7 reads as a tidy S-turn at low water — but let the river rise and its lower half erupts into the North Sea: a boulder-strewn Toreva-block maelstrom of waves that break back upstream and stack into walls of muddy water. Flip here when it is big and your boat may not stop until North Wash, with or without you. Sneak the breakers on the left, or charge the middle and find out why they named a rapid after an ocean. (The guidebook uses “North Sea,” singular, for this specific feature — not the larger composite.)
Eight rapids, one ragged breath. When the water is up, Rapids 13 through 20 quit pretending to be separate drops and fuse into Mile Long — a sustained mile of wave train that kicks off at the Range Canyon debris flow and simply will not quit. No eddies to duck into, no time to bail the boat, just a relentless, grinning, soaked-to-the-bone ride that finally turns you loose at Ben Hurt (R20). At moderate flows it eases to a 13–19 run with Ben Hurt standing alone below.
Rapid 13 is the upstream end of the Mile Long sequence — the rapid created by the Range Canyon debris-flow outwash entering the Colorado on river-right. The character of the rapid is directly shaped by boulders delivered from the Range Canyon drainage during flash floods. Immediately below Range Canyon Camp, which is the common staging camp for parties scouting Mile Long from the scree-hill perch above. Range Canyon debris-flow outwash is the sediment-science story here: flash floods from Range Canyon deposit boulders and cobbles onto the river, and the Green-Colorado combined discharge works those boulders through the channel creating the Rapid 13 drop. It is a live debris-fan rapid whose character can shift significantly after major Range Canyon flash-flood events.
Mile Long's technical crux. Scouted by most groups.
A Mile Long camp at the foot of Rapid 15 (Capsize), looking downstream to the Button.
Island Rapid. Final warm-up before the Big Drops at moderate flow; folds into Mile Long at high water.
The main event. In well under a mile the Colorado throws its three heaviest punches back to back — Big Drop 1, then Big Drop 2 with its infamous Little Niagara and Ledge Wave, then Big Drop 3 (Satan’s Gut) guarding the exit. At flood the three fuse into one continuous, heart-in-the-throat plunge with barely a breath between them: the most consequential whitewater on the Colorado above the Grand Canyon, and the reason crews train for years before they run Cataract. Scout it from the right. Respect it. Then hang on.
Kolb Rapid.
Features: Marker Rock, Little Niagara, Fang Rocks, Ledge Wave, Red Wall, Window.
A river-right camp between Big Drop 2 and Big Drop 3, also called Big Drop 3 Beach.
Satan's Gut / Ross Falls. Features: Frogg's Hole, Big Bertha/Brahma, Big Mossy, Table Rock.
Useful lower-canyon camp area for parties exploring the re-emergent lower section and Dark Canyon vicinity when conditions allow.
The snow melting in two river basins eventually meets here. As the Colorado and Green rise, Cataract changes shape. At low water, boulders stand exposed and narrow passages ask for careful moves. As the river climbs, familiar rocks disappear, waves build, and currents drive harder across the channel. At flood stage, a place you remember looking down into can rise above your head. There’s less time between moves, and farther to go before the river lets you collect yourself.
Watch both rivers. The gauges near Potash and Mineral Bottom offer an upstream estimate of their combined flow; the Gypsum Canyon gauge measures the joined river farther downstream. Read those numbers alongside the trend—rising, holding, or falling. Water takes time to travel, and today’s readings upstream aren’t necessarily today’s flow at the Big Drops. The number helps you picture what’s coming. The scout shows you what’s there.
Lower flows generally create more exposed rock, more technical line choice, slower travel, and more scouting emphasis at named rapids. Consequence remains high even when overall wave size is reduced.
Medium flows often deliver the classic Cataract mix: powerful but readable wave trains, major reaction time demands, and significant but manageable consequence for well-rigged expert groups.
High water transforms the canyon into a true big-water venue with massive laterals, breaking waves, exploding holes, fewer recovery opportunities, and rapidly compounding consequences through the Big Drops and downstream wave trains.
Water can be deceptively cold in spring runoff. Even in warm weather, swims are serious because of distance, force, and the remoteness of the canyon.
Combined Potash + Mineral Bottom reading — the two launch-zone gauges, summed. Equivalent post-Big-Drops reading available on the Gypsum Canyon gauge, which has thinner historical data.
Long-record analog · 1913–2026 · single-day values ±5%
The ledge rock in Big Drop 3 is exposed. Don't take your dory.
Class III character with technical, rocky lines through the Big Drops. Pool-drop sequencing dominates; the long flatwater approach drags. Best for boulder-garden navigation and skill development.
The sweet spot for experienced self-guided crews. Big Drops are powerful but read-and-run with clean lines. Sandy beaches above water; hydraulics are well-defined and readable.
Big-water Class IV. Hydraulics intensify, the sequence feels compressed, and pool recovery shrinks. Rewarding for crews with prior big-water experience; not a first run.
Most recently reached: 2001, 2007, 2013, 2020, 2022
Pools start to wash out and beaches flood. Of the big water levels, this flow band is the most washed out. Now, North Seas & South Seas are starting 10-15', the Claw in Big Drop 2 is the major gotcha, Button Hole is washed. As always Rig to flip.
Most recently reached: 2006, 2015, 2016, 2017, 2024
Most beaches are gone. North Seas, Mile Long South Seas top out around 20' and the Big Drops are in full flex. Expedition-grade above 50,000 cfs — commercial outfits shift tactics or cancel; private trips at that level only with a deep big-water experience. Webb, Belnap and Weisheit warn that at these flows the canyon can be very dangerous and boats frequently flip.
Most recently reached: 2010, 2011, 2014, 2019, 2023
Flood stage, up to the highest daily flow the gauges ever recorded: 130,100 cfs on June 27, 1917. Bigger floods came through unmeasured: the upstream Colorado gauge has no record for 1918–1922, and Webb/Belnap/Weisheit put the 1921 flood, the largest of the twentieth century, at about 147,000 cfs. Not a runnable target; the Big Drops at their absolute limit.
When Cataract runs big, it runs bigger than almost anything you can put a boat on, and the Big Drops don’t need a fraction of the record to demand everything you’ve got. This is a big-water canyon that earns its reputation the hard way.
Webb, Belnap & Weisheit, Cataract Canyon, ch. 7, p. 179
Below the Big Drops, the lower canyon keeps Cataract’s ghosts. Dark Canyon — by reputation the most feared rapid of the pre-reservoir river — went under when Lake Powell filled, along with the rest of the lower rapids. As the reservoir falls, some have surfaced again; Dark Canyon has not. What runs down there in a given year has less to do with snowpack than with where Powell’s shoreline is standing.
Best known for late-spring and early-summer snowmelt, with character shifting from rocky low-water whitewater to large, dynamic big-water conditions.
Beneath it all lies salt, left by an older sea. Groundwater slowly dissolves it, while the buried salt yields under the weight above. As that foundation shifts and the river cuts deeper, great sections of canyon wall fracture, slide, and break into enormous blocks. Those blocks, joined by boulders delivered from side canyons, help shape Cataract’s whitewater. When snowmelt swells the river, water piles against them, pours over ledges, and folds back on itself. Rocks that stand exposed at low water disappear beneath waves and holes. The ancient seas are still shaping what happens to your boat.
↑ Rim
↓ River level
The riparian corridor here is a biological thread through otherwise bare rock. Tamarisk and willow crowd the banks where sediment has accumulated; cottonwood groves mark the rare points where groundwater reaches the surface.
Side canyons concentrate the life — seep-fed hanging gardens, maidenhair fern clinging to alcove walls, desert varnish streaking the Wingate above. Bighorn sheep work the ledges and talus. Golden eagles and peregrines hunt the thermals. Great blue herons stand in the shallows below camp, unbothered. But the ecology is also a story about disturbance. Tamarisk is invasive and persistent. Flash floods reshape beach habitat on a storm-by-storm basis. The dam upstream altered the river’s sediment regime — the pre-dam Colorado carried 380,000 tons of sediment per day past this point; the post-dam river carries a fraction of that. Camps that existed before Lake Powell’s maximum pool were buried. Some are re-emerging now. The humpback chub — endemic to the Colorado system, adapted to the warm, silty, violent river that no longer exists — persists here in one of its last remaining strongholds.
People have been in this canyon for more than ten thousand years. Ancestral Puebloan granaries and rock art mark the alcoves. Fremont-culture sites appear in the side canyons. Ute and Paiute peoples — whose cultural continuity with earlier inhabitants is documented but often overlooked — used the river corridor seasonally and knew it intimately long before Powell arrived in 1869 half-starved and terrified, gave the rapids numbers instead of names, and wrote about them in language that mixed genuine awe with Victorian expedition bravado.
Bert Loper spent decades trying to get back to this canyon. He died at 79, running a rapid in Grand Canyon, still committed to the river as a life’s work rather than a vacation. In 1983, an uncontrolled release from Glen Canyon Dam sent floodwater downstream and reminded everyone that the Colorado is older than the infrastructure built to contain it. Kevin Fedarko’s account of the speed run through Grand Canyon during that flood — the crew of the Emerald Mile pushing a wooden dory through water no one had seen in a generation — captures something essential about this river: it rewards obsession and punishes overconfidence in equal measure. The lower canyon adds a more recent chapter. Lake Powell’s rise buried rapids that boatmen had run for decades. Its decline is exposing them again — along with sediment terraces, re-emerging shorelines, and the physical evidence of what Marc Reisner called the West’s most ambitious experiment in rearranging nature.
Cataract planning rewards the methodical and punishes the optimistic. The shuttle alone — Potash to North Wash — is 215 miles of highway and remote desert road that takes five to six hours in good conditions and can take longer when weather, road damage, or reservoir access complications intervene.
Most parties launch from Potash; Mineral Bottom and Green River State Park are standard alternatives that add approach miles but change the trip’s character. The take-out question is never fully settled until you get there. North Wash and the Dirty Devil confluence are the common options, but usability shifts with lake elevation, road conditions, mussel-inspection requirements, and seasonal closures. Professional shuttle support is the norm, not the exception. Satellite communication is essential. Self-support groups without motors should plan conservatively — wind on the approach and lower canyon can cost you an entire day.
The confluence of the Green and Colorado Rivers in Canyonlands National Park. **No vehicle access. No boat ramp. No road of any kind reaches this point.** Boaters arrive only by floating in (Meander Canyon down the Colorado from Potash, or Stillwater Canyon down the Green from Mineral Bottom or Green River, UT) or by foot from the Doll House (via the Spanish Bottom trail, which itself is reached only by 4WD via the Maze District). Serves as the take-out point for Meander Canyon (Colorado) and Stillwater Canyon (Green) via river shuttle — Tex's Riverways / Big Tex Expeditions operates jetboat pickup here and returns boaters to Moab or Potash. The geographic put-in for Cataract Canyon — every Cataract trip enters at this point regardless of where the trip itself launched. Trip-level shuttles (Potash → North Wash, Mineral Bottom → North Wash, etc.) live on the river-trip entities, not on the Cataract section.
Colorado-Green Confluence to Mille Crag Bend
Note: the figures here describe the typical Potash → North Wash trip-shuttle (Meander Canyon launch + this section + take-out), not a shuttle for this section alone. The Cataract section's geographic put-in is the Colorado–Green Confluence, which has no road access and no boat ramp — every Cataract trip enters by floating in (Meander down the Colorado from Potash, or Stillwater down the Green from Mineral Bottom or Green River, UT). Trip-level shuttles live on the river-trip entities (e.g., potash-to-north-wash, mineral-bottom-to-north-wash); this section-level field is retained for now as a planning convenience for the most common Potash-launched path. Actual mileage and time vary with routing, launch choice, weather, and whether shuttle operators stage through Hanksville, Moab, or Bullfrog corridors.
Google used a car, their times do not account for towing a trailer, driving on washboard, pitted pavement, and dirt that goes to grease in the rain — our adjusted times help align to the reality of running real river shuttles.
All trips through Cataract Canyon require a river permit. Canyonlands states there is no lottery for river permits; overnight permits are reserved through Recreation.gov on seasonal release schedules, and day-use permits are handled separately.
Canyonlands river regulations require a portable human-waste system and fire pan for river trips. Lake Powell mussel-cleaning rules may also apply after take-out, depending on route and launch/take-out interaction with affected waters.
Cataract demands expedition-grade systems. This is not a trip where you find out what you forgot — it’s a trip where forgetting the wrong thing becomes consequential by mile forty. Most parties rig fully self-contained oar rigs with overnight frames, strapped loads, and whitewater-rated dry storage.
Rescue capacity is non-negotiable: throw bags, pin kits, spare oars, and at least one person in the group who has practiced the skills rather than just packed the equipment. Sun protection matters more than people expect — reflected UV off water and sandstone compounds the exposure. Cold-water preparedness matters more than the air temperature suggests — spring runoff can be in the forties, and a swim in the Big Drops is not a thirty-second inconvenience. Motors are common and defensible. The flatwater approach and lower-canyon headwinds can consume days for oar-only groups. The question isn’t whether motors are ‘cheating’ — it’s whether your group has a realistic plan for making thirty miles of flatwater and reservoir travel without them.
The section rewards expedition-grade systems over minimalist packing. Even expert kayakers generally rely on strong group support. Raft crews should prioritize spare rigging, frame integrity, rescue systems, and realistic contingency planning for flips, lost time, wind, and changing take-out conditions.
Non-negotiable for this launch. Rangers may check for several of these at the put-in.
Field-tested picks that earn their place on this trip.
Not essential, but worth the boat space if you have it.
On a seven-day trip, you'll cook roughly 20 meals on a folding table in the sand. The constraint isn't ambition — it's ice management. Days one through three, you have real cooler capacity. Days four and five are the transition zone. Days six and seven are pantry cooking.
The best river cooks plan backward from the last night. If your final dinner is still good — not just edible, but genuinely good — the trip ends on a high.
Two coolers, segregated by access frequency. A well-managed deep cooler will hold usable ice through day 6 in 100°F air temps.
Folding table, two-burner propane stove, cast iron skillet, Dutch oven, and a large pot. The Dutch oven is the single most versatile piece.
Books that shape the science, history, and stories behind this place.
The standing reference for running the Colorado–Green system through Canyonlands — waterproof, segment-by-segment maps covering put-ins, take-outs, named rapids, mile markers, and camps from Cisco and Green River City down through Cataract.
An in-depth environmental and human history of Cataract Canyon and the rivers of Canyonlands, exploring Indigenous presence, exploration, dam impacts, river ecology, and the evolution of modern river running.
Edward Abbey's classic portrait of canyon country, solitude, and wilderness, influential to the identity and mythology of the Colorado Plateau.
A river-running memoir by Roy Webb capturing the spirit, humor, and culture of Western river expeditions and the people who chase moving water through canyon country.
A comprehensive guidebook to whitewater rivers in Utah and neighboring regions, covering river access, rapids, flow considerations, trip logistics, and historical context for river runners.
The thrilling story of the dory daredevils who set a speed record through the Grand Canyon at the height of the legendary flood of 1983 — and of the river that made it possible.
Evidence behind the claims on this page — agency rules, maps, gauges, books, and field notes.
