Skip to content
38.6617332146727°N 109.50065594538283°W
Colorado River — UT

Jackass Canyon

10 miles Class I–I 1 days
Flow Class I throughout; check the Moab gauge.
Season Runnable year-round in mild years; best April-May and September-October.
Duration 1–1 days (typical 1)
Permit No permit required — BLM day use.
Shuttle 12 mi — 0.3 hrs
Logistics UT-128 paved shuttle end-to-end.
Overview

10-mile Class I float from Take Out Beach through Moab to the US-191 Moab Bridge, with seven BLM campgrounds along UT-128.

The 10-mile reach from Take Out Beach downstream through the lower Highway 128 corridor and past the town of Moab to the Moab Bridge (US-191). Named for Jackass Canyon — one of the side drainages along this stretch, at Grandstaff Campground. Seldom floated as a standalone trip because most commercial Moab Daily parties exit at Take Out Beach upstream; the reach is instead used as an extension for paddlers continuing through town toward The Portal and Potash, or as a shorter private-paddle option from Grandstaff or Big Bend Campground. Class I flatwater throughout. The reach includes most of the BLM campgrounds of the Colorado Riverway corridor: Big Bend, Upper Big Bend, Oak Grove, Hal Canyon, Drinks Canyon, Grandstaff, and Goose Island.

Trip styles
canoe day trip, paddleboard day trip, inflatable kayak day trip, oar raft day trip
Ideal for
paddlers continuing past Moab Daily, SUP and packraft paddlers, short private overnights combined with UT-128 camping
River type
flatwater, moving-flat, desert canyon, urban-edge
10 miles
1 days typical

Flows & Hydrology

Reference Gauges

Colorado River near Moab, UT

USGS gauge on the Colorado River near Moab, UT — a key reference point for the Moab area river sections including Ruby-Horsethief, Westwater Canyon downstream flows, and upper Cataract Canyon planning. Located upstream of the Dolores River confluence.

Current flow — Colorado River near Moab, UT

Updating… Provisional

7-Day Forecast

Loading forecast…
Seasonality
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Geology

The Moab Valley is a classic collapsed-salt-anticline valley formed by dissolution of Paradox Formation salt deep below. As the river exits the Moab Valley at the Moab Bridge, the canyon walls constrict at The Portal — the geologic 'opening' where the Colorado re-enters a narrow-wall canyon. Jackass Canyon itself is one of the minor side drainages on this reach; Grandstaff Canyon (formerly Negro Bill Canyon) is a larger tributary entering near Grandstaff Campground.

Rock Record
Entrada Sandstone
Navajo Sandstone
Kayenta Formation
Wingate Sandstone
Province
Colorado Plateau
Rock types
sandstone · alluvium
Ecology
Logistics
Gear
Camp Kitchen

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.

Dinner Ideas by Trip Day
10River miles
Reading the River

Books that shape the science, history, and stories behind this place.

Boatman's Quarterly Review Anthology

Boatman's Quarterly Review Anthology

Multiple Authors · 2000

A collection of essays and stories from the legendary Boatman's Quarterly Review publication, documenting the culture, lore, and voices of Grand Canyon river guides.

tone storytelling cultural context
Cadillac Desert

Cadillac Desert

Marc Reisner · 1986

A foundational book on Western water development, dams, irrigation politics, and the long struggle over the Colorado River and the arid American West.

knowledge philosophy cultural context
Canyon Country

Canyon Country

Donald L. Baars · 1989

An accessible introduction to the rock layers, canyon formation, and landscapes of the Colorado Plateau and canyon country.

knowledge
Cataract Canyon

Cataract Canyon

Robert H. Webb, Jayne Belnap, John S. Weisheit · 2007

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.

knowledge cultural context philosophy
Desert Solitaire

Desert Solitaire

Edward Abbey · 1968

Edward Abbey's classic portrait of canyon country, solitude, and wilderness, influential to the identity and mythology of the Colorado Plateau.

tone philosophy
Down the Great Unknown

Down the Great Unknown

Edward Dolnick · 2002

The dramatic story of John Wesley Powell's first expedition through the Grand Canyon and the birth of river exploration in the American West.

storytelling cultural context knowledge
Fluvial Processes in Geomorphology

Fluvial Processes in Geomorphology

Luna B. Leopold, M. Gordon Wolman, John P. Miller · 1964

A foundational scientific text on river geomorphology, covering sediment transport, channel form, fluvial dynamics, and the physical processes that shape river systems.

knowledge
Geology of Utah's Rivers

Geology of Utah's Rivers

William T. Parry · 2016

A geological exploration of Utah’s major river systems explaining how tectonics, sedimentation, and erosion shaped the canyon landscapes of the Colorado Plateau and surrounding regions.

knowledge
House of Rain

House of Rain

Craig Childs · 2007

Craig Childs traces the routes of the ancient Anasazi across the Colorado Plateau, uncovering evidence of a lost civilization's migrations through canyon country.

storytelling cultural context philosophy
How to Read Water

How to Read Water

Tristan Gooley · 2016

A guide to understanding the subtle clues in water movement—from puddles and rivers to oceans—teaching readers how currents, waves, surface textures, and patterns reveal information about wind, depth, obstacles, and landscape.

knowledge tone
If We Had a Boat

If We Had a Boat

Roy Webb · 1986

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.

tone storytelling cultural context
Introduction to Physical Hydrology

Introduction to Physical Hydrology

Martin R. Hendriks · 2010

A rigorous, university-level introduction to physical hydrology covering the full water cycle — precipitation, evapotranspiration, infiltration, groundwater, runoff generation, and streamflow — with quantitative methods throughout. The scientific foundation for understanding how rivers work at the watershed scale, from snowpack in the Rockies to baseflow in canyon rivers.

knowledge
River Mechanics

River Mechanics

Pierre Y. Julien · 2002

A rigorous graduate-level treatment of river hydraulics and sediment transport, covering flow resistance, bedforms, channel stability, and the physical mechanics that govern river behavior.

knowledge
River of Contraries

River of Contraries

Don Lago · 2010

A sweeping history of the Colorado River and its complex relationship with Western culture and landscape.

knowledge cultural context philosophy
River Runners' Guide to Utah and Adjacent Areas

River Runners' Guide to Utah and Adjacent Areas

Gary C. Nichols · 2009

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.

knowledge
Sunk Without a Sound

Sunk Without a Sound

Brad Dimock · 2001

The story of Norman Nevills and the birth of commercial river running in the Colorado River basin.

storytelling cultural context knowledge
The Canyon Country Zephyr Anthology

The Canyon Country Zephyr Anthology

Multiple Authors · 2010

A collection representing the voice, arguments, stories, and culture of canyon country, especially around Moab and the desert Southwest.

cultural context tone philosophy
The Colorado Plateau

The Colorado Plateau

Donald L. Baars · 1983

A key geological reference for understanding the uplift, stratigraphy, tectonics, and erosional history of the Colorado Plateau.

knowledge
The Colorado River in Grand Canyon

The Colorado River in Grand Canyon

Larry Stevens, Tom Martin · 1987

A classic guide to the Colorado River through Grand Canyon with geology, ecology, and river running notes.

knowledge
The Control of Nature

The Control of Nature

John McPhee · 1989

Three deeply reported narratives about humanity's attempts to stop rivers, lava, and debris flows — and what the land does in return. A masterwork of geological journalism that asks whether nature can ever truly be controlled.

tone storytelling philosophy knowledge
The Emerald Mile

The Emerald Mile

Kevin Fedarko · 2013

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.

tone storytelling knowledge cultural context
The Exploration of the Colorado River

The Exploration of the Colorado River

John Wesley Powell · 1875

Powell's original account of the first scientific expedition through the Grand Canyon, documenting the geology, natural history, and challenges of navigating the unknown Colorado River.

knowledge storytelling cultural context
The Last River Run

The Last River Run

Todd Balf · 2001

The story of the final free-flowing run of Glen Canyon before Lake Powell filled the canyon, capturing a vanished landscape and the culture it held.

storytelling philosophy cultural context
The Monkey Wrench Gang

The Monkey Wrench Gang

Edward Abbey · 1975

A gang of desert outlaws wage a reckless, irreverent war against the machines carving up the American Southwest.

tone philosophy cultural context
The Secret Knowledge of Water

The Secret Knowledge of Water

Craig Childs · 2000

Craig Childs explores the hidden water sources and desert hydrology of the American Southwest, revealing how water shapes and sustains life in the most arid landscapes on Earth.

tone philosophy knowledge
The Very Hard Way

The Very Hard Way

Brad Dimock · 2007

Brad Dimock's exhaustive biography of Bert Loper — gold prospector, early Colorado River boatman, and one of the great stubborn characters of Western river history — who died in Grand Canyon at 79, alone in his boat in a rapid, on the river he refused to leave. The definitive account of the Colorado River's pioneer running era.

storytelling knowledge cultural context
Westwater Lost and Found

Westwater Lost and Found

Mike Milligan · 2001

A story centered on the legendary Westwater Canyon stretch of the Colorado River, blending river-running culture, history, and storytelling from one of the most iconic whitewater sections in the Southwest.

storytelling cultural context
Moab Daily
Upstream Moab Daily
The Portal
Downstream The Portal