Massachusetts · Middlesex Co.

Sudbury River

★ Wild & Scenic
Middlesex Co. · 32 mi · Class Flat
Optimal: 80–500 CFS · USGS #01098530
220 avg
163CFS
5.90 ft gauge height
Optimal
→Stable
⚡Flow data is live from USGS·Rapid classifications and CFS ranges need community verification·Know this river?
Avg flow: 220 cfsHist. median: 198 cfsUSGS #01098530
National Wild & Scenic River (1999) · Great Meadows National Wildlife Refuge

The Sudbury River, together with the Assabet and Concord, forms the SuAsCo (Sudbury–Assabet–Concord) Wild & Scenic system that Henry David Thoreau called 'the meadow-haunted river.' 32 miles of slow flatwater through Great Meadows National Wildlife Refuge — one of the most ecologically rich and historically significant paddling corridors in New England.

Outfitters
OARS River Tours
Guided Sudbury-Assabet-Concord paddle trips
South Bridge Boat House
Canoe and kayak rentals, downtown Concord
10-Year Flow Patterns
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Your Optimal Range
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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.

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