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Difficulty II
Length 6 Miles
Gauge Upper Ammonoosuc-Upper
Flow Range 2200 - 4000 CFS
Flow Rate as of: 1 second ago N/A
Reach Info Last Updated 05/02/2018 2:57 pm

River Description

The Upper Ammo needs a lot water for a fluid run.  Therefore you would be hard pressed to find this river running unless everything else in the neighborhood is at or near flood stage.  The river itself is an easy class I-II at the begining and eventually builds up to a steady class II with a few small ledge drops.  Gorge-us is the most difficult section in this run.  It is recognized by a sharp right bend up against a shear granite wall on river left approximately 4.8 miles below the put-in.  Gorge-us should be considered a class II+ or III depending on level.  It is easily portaged on river right.

Be aware that most of this run is wild and a difficult bush wack back to civilization, it makes for a great northern New England wilderness experience but a nightmare if problems arise.

Rapid Descriptions


Class - III Mile - 4.8

4.8 miles from the put in you will come across a few more difficult and tightly spaced ledge drops of about 1 to 2 feet.  When you see the river take a sharp right up against the granite wall on river left take on on river right to scout and/or portage.  The rapid itself is only 30 yards long but drops steeply with three or more large hole / waves in the center flow.  You can sneak the right side but look out for shallow rocks that could push you back into the main flow.  The tail end of the rapid produces some nice symetrical surfing waves with a good access eddy on both sides.


Summary of Gauge Readings

The Upper Ammonoosuc has a gage several miles downstream in Groveton NH.  It is estimated that a minimum run should be about 2200 cfs on the gage for a fluid run up river. 

Gauge NameReadingTimeComment
Upper Ammonoosuc-Upper
AW Gauge Info
N/A Be aware that this gage is situated several miles downstream from the run. Use this as a rough estimate of runnability. If other rivers in the area are at or
AW Gauge Info
727 cfs 64d06h44m We don't yet know what's a reasonable min/max level for this stream. Please help us provide the best beta by adding a comment.

Directions Description

We have no additional detail on this route. Use the map below to calculate how to arrive to the main town from your zipcode.


No Accident Reports




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