Ammonoosuc - 4. Twin Mountain to Pierce bridge


Ammonoosuc, New Hampshire, US

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4. Twin Mountain to Pierce bridge

Usual Difficulty II-III (varies with level)
Length 2.9 Miles
Avg. Gradient 41 fpm
Max Gradient 48 fpm

Middle Ammonoosuc


Middle Ammonoosuc
Photo of Sharon Lacroix by Mark Lacroix taken 07/04/13 @ 450 cfs

Gauge Information

Name Range Difficulty Updated Level
AMMONOOSUC RIVER AT BETHLEHEM JUNCTION, NH
usgs-01137500 2.60 - 6.00 ft II 00h28m 2.03 ft (too low)


River Description


The description here is from the put in along state route 302 about two miles west from the intersection of state route 3 in Twin Mountain.  Look for a convenient riverside pull off.  Alternatively, you can access the river close to the route 3 intersection and run the upper part.  This adds 2 to 3 miles of class I-II river good for a warm up before encountering the continuous class II and III waters below. 

The river starts with typical boulder strewn class II  then builds up to a more difficult class III- drop called Boat Breaker just half a mile upstream of the take out at Pierce bridge. 

Most of the river is secluded and out of site of the road with tall northern spruce along the banks.  There are occasional camps along the way.

Technical info

Put in elevation........1286'
Take out elevation......1167'
Total drop..............119'
1st mile................46'
2nd mile................30'
2.9 mile................43' (48' average)
Average drop/mile.......41'
Distance................2.9 miles
River width average.....70'
River geology...........Small to medium granite boulders
River water quality.....good to excellent, clarity good.
Scenery.................Nice Mountain scenery, most of this stretch runs away
                        from the road.
Wildlife................Deer, hawks, moose, beavers, mink. 


StreamTeam Status: Not Verified
Last Updated: 2013-07-06 11:14:41

Rapid Descriptions

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