Colorado - 07. Shoshone Power Plant, Exit 123 (I-70) to Grizzly Creek, Exit 121 (I-70)

Colorado, Colorado, US


07. Shoshone Power Plant, Exit 123 (I-70) to Grizzly Creek, Exit 121 (I-70) (Shoshone)

Usual Difficulty III-IV (for normal flows)
Length 2 Miles
Avg. Gradient 39 fpm


Photo of Bonnie Gallagher and Will Reeves by Irene Verstraete @ 960 cfs

Gauge Information

Name Range Difficulty Updated Level
usgs-09070500 500 - 10000 cfs III-IV 45d23h40m 738 cfs (running)

River Description

Photo: Baptism Rapid, by Arlo Grammatica, courtesy of and copyright by Check out their description of this reach.

Rivers of the Southwest, F.Anderson

Reaches of the Colorado River:
01. Hot Sulphur Springs to Hwy 40 bridge (Byers Canyon) (CO, IV)
02. Gore Canyon (CO, IV-V)
03. Pumphouse campground to Rancho Del Rio (Pumphouse) (CO, III)
04. Hanging Lake Exit 125 (I-70) to Shoshone Power Plant Exit 123 (I-70) (Barrel Springs) (CO, IV-V [V+])
05. Shoshone Power Plant, Exit 123 (I-70) to Grizzly Creek, Exit 121 (I-70) (Shoshone) (CO, III-IV)
06. Cameo Dam (Big Sur / Lucky 7) (CO, III)
07. Loma to Westwater (Ruby / Horsethief Canyons) (CO-UT, II)
08. Westwater to Rose Ranch (Westwater Canyon) (UT, I-IV)
09. Cisco (Rose Ranch) to Moab (Professor Valley) (UT, I-III)
10. Moab to Powell Reservoir (Cataract Canyon) (UT, I-IV)
11. Lees Ferry to Lake Mead (Grand Canyon) (AZ, I-V)
12. Black Canyon (AZ-NV, I)


StreamTeam Status: Not Verified
Last Updated: 2010-10-08 02:27:33


Rapid Descriptions

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User Comments

Users can submit comments.
September 26 2016 (844 days ago)
Justlive (157352)
I think it is the hardest III+ in the state besides Waterton Canyon. It is most definitely more
difficult than Browns Canyon. However, I say this because Shoshone is so powerful. But it is
unlikely you will swim if someone leads you down. Frankly, I rarely see a swimmer so maybe its just
me and you will rate it III and leave off the +. But jump in this river near 3000 cfs and make no are flirting with IV-. I have done some class V and I am nervous about trying this
run at 4000 or higher. But this river and I have a bad history. I always have to brace out of some
situation or another. Easy to scout...jig the path...adds to the fun.

Associated Projects

  • Basin Non-Consumptive Needs Assesments (CO)
    AW is working to define stream-flows that meet recreational boating needs across Colorado. In both the Colorado and Yampa River Basin's, AW has helped develop baseline data for whitewater recreation
  • Upper Colorado River (CO)
    American Whitewater is working with various stakeholders to develop a resource management plan for the BLM, as an alternative to "Wild and Scenic River" management.