Sandy - 2. Lolo Pass Road (Zigzag) to Marmot Dam site

Sandy, Oregon, US


2. Lolo Pass Road (Zigzag) to Marmot Dam site

Usual Difficulty II-III (for normal flows)
Length 13.5 Miles
Avg. Gradient 70 fpm

Alder Creek

Alder Creek
Photo of Ray Capone by Thomas O'Keefe taken 11/13/10 @ 1300 cfs

Gauge Information

Name Range Difficulty Updated Level
usgs-14137000 700 - 2000 cfs II-III 00h34m 907 cfs (running)

River Description

The section from Lolo Pass to Marmot (Sleepy Hollow Bridge) is boulder filled and changes year to year.  It is mostly class II with some class III areas at regular flows.  The run becomes fun class III-IV at high flows, but wood is sometimes present .  At very high water (rocks heard rolling along the bottom) the confluence with the Salmon gets turbulent and the rest of the run is a fun flush down the middle with large waves and some holes that can sneak up on you.

The most distinct rapid are the class IV Alder Creek Rapids, near an A-framed house on the left.  Scout this rapid along the bedrock on the right.  From here to the old Marmot Dam sight is class II-III with a sneaky hole at the end of a long straight away a mile or so below Alder Creek.


StreamTeam Status: Not Verified
Last Updated: 2015-11-23 22:32:59

Rapid Descriptions

icon of message No rapids entered. If you know names, and locations of the rapids please contact and advise the StreamTeam member for this run.

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Associated Projects

  • Sandy River Restoration (OR)
    AW is working to protect the Sandy River Gorge and restore the river through removal of Marmot Dam in Oregon.