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Difficulty III-IV
Length Miles
Gauge Diamond River near Wentworth Location, NH
Flow Range 500 - 1500 CFS
Flow Rate as of: 36 minutes ago 577 [CFS]
Reach Info Last Updated 05/01/2018 10:23 pm

River Description

Access through Dartmouth College land to the river is somewhat restricted. It is necessary to carry upstream from the take out unless special permission can be obtained. Carry up past the Dead Diamond tributary bridge and put in on the Swift Diamond as far up as you wish to hike. The Swift Diamond is mostly class III until the confluence with the Dead Diamond branch. At this point the river tumbles steeply through a narrow gorge with continous class IV water. Above 1000 cfs the gorge can be continous class IV-V with no let up till close to the takeout.

Information supplied by Todd ? at Saco Bound Northern Waters in Errol.

Rapid Descriptions


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1 year ago

Ran 5/26/2019 in a raft, two experienced boaters. Arguably Class IV+ at 1100 CFS. Was able to scout first big rapid from Gorge Lookout on the road, but second big rapid below was a surprise. A large boulder in the middle of the river made things tricky too. Put in at Winter Rd on Swift Diamond and took out at Gate Camp. A few fun Class III sections and quickwater on Swift Diamond, beautiful and secluded.

Gage Descriptions

Historical Flow Information

Historical Dates: Mean High Water Date / Flow May 2nd/ 1580 cfs Mean Low Water Date / Flow: Sept. 6th/ 98 cfs Based on 65 years of flow information
The table above gives the historical high and low flow dates for this particular stretch of river. This information is extrapolated from the USGS database.

Usually a spring run but can come up during a rainy period.

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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Alex Barham


Matt Muir


Revision #Revision DateAuthorComment
1209415 05/01/18 Alex Barham Location
1193856 11/05/06 n/a n/a