
(USGS)
6,790 CFS
Day 1
4,290 cfs (USGS daily mean), water 62°F















Day 1
The last band of sun holds on the butte cap while the benches below have already gone flat and cold.
Jon Koenig / Desert Maritime

Wall-and-talus geometry from boat level — the bench of broken rock between the cliff base and the water.
Jon Koenig / Desert Maritime

Almost all of the corridor is in shade; one rim block is still catching sun.
Jon Koenig / Desert Maritime

The far butte holds the light long after the near wall loses it — and the river hands the color back.
Jon Koenig / Desert Maritime

Light narrowing to the caprock — the whole lower canyon already gone to shadow.
Jon Koenig / Desert Maritime

Downstream toward the light, the near wall standing dark on river left.
Jon Koenig / Desert Maritime

Full wall in warm light — ledge, slope, ledge, all the way up to the butte.
Jon Koenig / Desert Maritime

Moonlight bright enough to read the clouds, and water flat enough to double them.
Jon Koenig / Desert Maritime

Handheld at night — the wall is legible, the edges are not.
Jon Koenig / Desert Maritime

Rowing by moonlight, running lights down to one glow stick.
Jon Koenig / Desert Maritime

Wall, sky, and water all lit by the same moon — the boat just barely in it.
Jon Koenig / Desert Maritime

Nothing left but the skyline and the clouds working over it.
Jon Koenig / Desert Maritime

The whole rig in the frame: oars stowed, dry bags strapped, canyon going by in the dark.
Jon Koenig / Desert Maritime

A raised arm somewhere in the middle of a moonlit float; the shutter never had a chance.
Jon Koenig / Desert Maritime

A light-colored band in the wall picks up the moon while everything under it stays black.
Jon Koenig / Desert Maritime

Day 2
4,170 cfs (USGS daily mean), water 61°F













Day 2
Cove camp in the morning — the rig still tied off under the undercut wall, weather already sitting gray on the canyon.
Jon Koenig / Desert Maritime

Rain moving through on the confluence reach — flat light, flat water, the canyon gone monochrome.
Jon Koenig / Desert Maritime

The old warning sign above the river — two miles of notice, and a register box nobody has repainted in a while.
Jon Koenig / Desert Maritime

Looking downstream from the sign — open water, and the walls starting to gather in.
Jon Koenig / Desert Maritime

Starting up from the river — first steep pitch of the climb, spires already showing over the ledge.
Jon Koenig / Desert Maritime

The spires opening up over the ledges on the way in.
Jon Koenig / Desert Maritime

Inside the rock — rounded blocks and banded columns pressing in on the route.
Jon Koenig / Desert Maritime

The whole stand of spires from the bench, laid out end to end.
Jon Koenig / Desert Maritime

The other half of the two-person crew, up among the spires for scale.
Jon Koenig / Desert Maritime

Across the gorge to the far rim — a whole skyline of towers stacked on the horizon.
Jon Koenig / Desert Maritime

Distant peaks past the rim, weather building over the high country while the canyon stays dry.
Jon Koenig / Desert Maritime

Kitchen up, fire pan lit, boat on the line — lower camp settling in under a gray sky.
Jon Koenig / Desert Maritime

The lower camp bar — a lot of exposed sand, a lot of river, and weather sitting on the canyon.
Jon Koenig / Desert Maritime

Day 3
4,950 cfs (USGS daily mean), water 61°F





























Day 3
River-left ledges stepping up to the rim, under the day's flat gray ceiling.
Jon Koenig / Desert Maritime

Panorama from the oars — the whole corridor at once, boat included.
Jon Koenig / Desert Maritime

Two-person crew, mid-canyon.
Jon Koenig / Desert Maritime

Into the rapid corridor — talus slopes replacing sheer sandstone.
Jon Koenig / Desert Maritime

A free-standing spire on the wall, doubled in the flat water.
Jon Koenig / Desert Maritime

A big sand bench on river right — the kind of camp low water leaves behind.
Jon Koenig / Desert Maritime

Straight up the wall — pale bench sandstone capped by the red unit above.
Jon Koenig / Desert Maritime

Potholed benches and knobbed rim, under a sky that kept threatening.
Jon Koenig / Desert Maritime

Boat tied off at the sand — the beach bigger than the boat by an order of magnitude.
Jon Koenig / Desert Maritime

Camp laid out on the bar — laundry on driftwood, kitchen table up, boat still in the water.
Jon Koenig / Desert Maritime

Flatwater mugging between the drops.
Jon Koenig / Desert Maritime

The rower's-eye deck — boxes strapped, oars shipped, canyon opening ahead.
Jon Koenig / Desert Maritime

Lining up the entrance, bow crew forward.
Jon Koenig / Desert Maritime

Past the big rock — the pillow doing most of the deciding.
Jon Koenig / Desert Maritime

Straight down on the boat, mid-run.
Jon Koenig / Desert Maritime

Standing on the oars, reading the next horizon line.
Jon Koenig / Desert Maritime

Butte dead ahead, rower checking the lens.
Jon Koenig / Desert Maritime

Into the wave train, bow crew braced.
Jon Koenig / Desert Maritime

Mid-rapid — the whole channel gone white.
Jon Koenig / Desert Maritime

One arm up on the first hit.
Jon Koenig / Desert Maritime

Same wave, water on the lens.
Jon Koenig / Desert Maritime

Both arms up — the best frame of the burst.
Jon Koenig / Desert Maritime

Pulled wide — the lane, the boat, and both rims at once.
Jon Koenig / Desert Maritime

Arms up as the wave goes under.
Jon Koenig / Desert Maritime

Grinning at the camera on the runout.
Jon Koenig / Desert Maritime

Sideways grin, oar still loaded.
Jon Koenig / Desert Maritime

Threading past a mid-channel rock the size of a truck.
Jon Koenig / Desert Maritime

Bony and technical — the low-water version of this drop.
Jon Koenig / Desert Maritime

Whole channel breaking, spires waiting downstream.
Jon Koenig / Desert Maritime

Day 4
6,750 cfs (USGS daily mean), water 62°F






















Day 4
Morning sun on both walls, a side canyon still holding its shadow.
Jon Koenig / Desert Maritime

Bow seat, morning corridor — the day's first miles.
Jon Koenig / Desert Maritime

A seep working its way down a jointed wall.
Jon Koenig / Desert Maritime

The bridge downstream — the canyon's first hard edge of road country.
Jon Koenig / Desert Maritime

Knobbed skyline over a green bench — the canyon opening out.
Jon Koenig / Desert Maritime

Pocketed slickrock standing right at the waterline.
Jon Koenig / Desert Maritime

Somebody's very bad day, still parked on the slope.
Jon Koenig / Desert Maritime

White streaking and a stick pile on a mid-wall ledge.
Jon Koenig / Desert Maritime

Whitewashed perch blocks under the rim band.
Jon Koenig / Desert Maritime

Out of the current and onto the reservoir — bow view, big sky.
Jon Koenig / Desert Maritime

Drawdown line running the whole shore.
Jon Koenig / Desert Maritime

Under the canopy on the flat — nothing to do but watch the walls go by.
Jon Koenig / Desert Maritime

Varnish above, bleach below — the reservoir's two-tone wall.
Jon Koenig / Desert Maritime

Weather building over the flat water, late in the day.
Jon Koenig / Desert Maritime

A channel marker naming a canyon the water swallowed.
Jon Koenig / Desert Maritime

An alcove cut clean into the bleached band, doubled in the flat water.
Jon Koenig / Desert Maritime

The storm arriving — visibility down to the nearest slope.
Jon Koenig / Desert Maritime

Tucked under the overhang while the rim let go.
Jon Koenig / Desert Maritime

Two falls running at once, and the boat right under the first.
Jon Koenig / Desert Maritime

Runoff still draining off the wall after the cell moved through.
Jon Koenig / Desert Maritime

Handheld at the stars — mostly dark, a few points holding.
Jon Koenig / Desert Maritime

Moonrise over the flat water, boat tied to the rock.
Jon Koenig / Desert Maritime

Day 5 — Take Out
8,460 cfs (USGS daily mean), water 62°F
Moments the crew logged on this run.
Low Water in the Dory
At the bottom of the runnable range, the Big Drops stop being a big-water problem and become a rock problem — and in a rigid dory, where hesitation costs a high side and even a clean line can end in a hull-cracking rock hit, low water turns out to be its own kind of hazard.
- frustration
- focus
- commitment
- grit
- humor
Colorado at Potash: 2,950–5,360 cfs (avg 3,732)
Green at Mineral Bottom: 1,390–2,560 cfs (avg 1,878)
Combined: 4,350–7,920 cfs (avg 5,610)
Lake Powell: 3544.13 ft at launch (3544.03–3544.46 ft during trip). USBR RISE API — Lake Powell at Glen Canyon Dam
Evidence behind the claims on this page — agency rules, maps, gauges, books, and field notes.
Permits
Hydrology
All 14 field sources
Access
Rapids
- book-excerpt Cataract Canyon (Webb / Belnap / Weisheit) — Selected Pages
- book RiverMaps Guide to the Colorado & Green Rivers in the Canyonlands of Utah & Colorado
Management
Books
Safety
- book-excerpt Cataract Canyon (Webb / Belnap / Weisheit) — Selected Pages

Cataract Canyon — June 2023

Cataract Canyon — December 2016

Gray Canyon — March 2020 (River Terrace)

Green River — May 2026 (Spillway Full Release, 9,800 CFS)

Desolation Canyon — March 2026

Cataract Canyon — May 2022
Cataract Canyon — July 2024
Moab Daily — May 2020 (Cinco de Mayo, Dropping Flows)
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