Connecticut River

River Overview

Grafton / Coos Co. · 270 mi · Class I–II
Optimal: 2000–10000 CFS · USGS #01138500
6,200 avg
1,340CFS
2.36 ft gauge height
Below Optimal
Falling slowly (-10 cfs/hr)(-30 in 3h)

Safety & Conditions

Flow data is live from USGS·Rapid classifications and CFS ranges need community verification·Know this river?

Live Conditions

⏳ Loading live storm reports for NHNWS · SpotterNet

River Details

As an Amazon Associate, RiverScout earns from qualifying purchases. Book links on this site are affiliate links — clicking through and buying supports our river coverage at no extra cost to you.
Avg flow: 6,200 cfsHist. median: 5,580 cfsUSGS #01138500
Connecticut River National Blueway · Silvio O. Conte National Fish & Wildlife Refuge

About

Adriaen Block Explores Connecticut River, 1614 — Hartford Landing. For thousands of years before any European sail crossed Long Island Sound, the river was the central travel and trade corridor of the Western Abenaki, who called it 'Kwenitekw' — 'long river.' Villages lined both banks from the headwaters to southern New England, sustained by runs of salmon, shad, and lamprey that returned year after year. The waterway was a highway, a larder, and a boundary long before it was mapped.

Adriaen Block's 1614 voyage upriver marked the river's entry into the colonial record. Sailing from New Amsterdam, he reached the site of present-day Hartford, became the first European to enter both Long Island Sound and the Connecticut River, and determined that Manhattan and Long Island were islands. The river soon anchored the colonial geography of New England: it formed the western boundary of the original 1620 Plymouth Colony grant, and the 1783 Treaty of Paris fixed it, in part, as the boundary between the United States and British Canada.

By the nineteenth century the watershed's forests had become the region's fuel. From the 1830s through the 1920s, the Connecticut River corridor was logged to feed the regional timber industry of the 1850s–1910s and the railroad expansion of the 1860s–1910s. Local sawmills, logging drives down the river itself, and downstream lumber operations were the major operators. Three developments ended the large-scale cutting: the exhaustion of the old-growth stands around 1910, the start of state forestry conservation in 1915, and the establishment of state forests in the 1930s.

Recovery has been the story since. From 2010 to the present, the New Hampshire Department of Natural Resources, working with local watershed partnerships, has addressed more than a century of logging, agricultural, and industrial impacts. Streambank stabilization between 2015 and 2024, native fish restocking from 2017 to 2024, a nutrient reduction strategy implemented beginning in 2018, and water-quality improvements from 2020 onward have been the major recent outcomes.

That restored river now carries formal recognition. In 2012, the Department of the Interior named the Connecticut River America's first National Blueway, honoring 410 miles of paddling heritage from the Canadian border to Long Island Sound. Its New Hampshire waters also fall within the Silvio O. Conte National Fish & Wildlife Refuge. For paddlers, the New Hampshire reach divides into three distinct characters: Pittsburg to Lancaster through the remote upper valley and moose country; Lancaster to Hanover across pastoral farmland in Dartmouth country; and Hanover to Charlestown, Class I–II water threading past covered bridges. Outfitters such as North Star Canoe Rentals, based in Cornish and specializing in multi-day trips, run the New Hampshire stretches, connecting today's boaters to a corridor that has moved people, fish, and freight for millennia.

Solunar Fishing Activity
🌔
Waxing Gibbous
95% illumination
Poor
Moon overhead
3:32 PM
Moonrise
10:55 PM
Moonset
8:09 AM
Moon underfoot
3:32 AM
Next full moon: Aug 282 days
Outfitters
North Star Canoe Rentals
Connecticut River trips from Cornish NH, multi-day specialists
10-Year Flow Patterns
See 10 years of flow patterns for this river — historical analysis is a Pro feature.Upgrade to Pro →
Your Optimal Range
Set your personal optimal CFS window per river — custom ranges are a Pro feature.Upgrade to Pro →
Data Quality

River conditions are community-verified. CFS ranges, difficulty ratings, and access points may not reflect every flow level or seasonal change. Always check current conditions, scout unfamiliar rapids, and paddle within your skill level.

Know the Connecticut River? Your local knowledge makes this page better for every paddler, angler, and guide who comes after you.
Improve This River →