Merrimack Basin (and Tributaries) - Merrimack River at a Glance - at Lowell - at Haverhill - at Lawrence Tributaries: ---------------- - Spicket River at a Glance - near Methuen - North Nashua River at a Glance - at Fitchburg - Squannacook River at a Glance - at West Groton - Nashua River at a Glance - at East Pepperell - Assabet River at a Glance - at Maynard - Sudbury River at a Glance - at Saxonville - Concord River at a Glance - at Lowell - Shawsheen River at a Glance - at Wilmington - at Andover - at Hanscom Field Merrimack River - Merrimack River at a Glance - at Lowell - at Haverhill - at Lawrence North Nashua River - North Nashua River at a Glance - at Fitchburg Squannacook River - Squannacook River at a Glance - at West Groton Nashua River - Nashua River at a Glance - at East Pepperell Assabet River - Assabet River at a Glance - at Maynard Sudbury River - Sudbury River at a Glance - at Saxonville

Concord River - Concord River at a Glance - at Lowell Shawsheen River - Shawsheen River at a Glance - at Wilmington - at Andover - at Hanscom Field Connecticut Basin (and Tributaries) - Connecticut River at a Glance - at Middle Haddam - at Montague - at Northampton - at Holyoke - Upper - at Holyoke - at Springfield - at Thompsonville - at Hartford Tributaries: ---------------- - Chicopee River at a Glance - at Indian Orchard - Westfield River at a Glance - at Westfield - Farmington River at a Glance - at Unionville - at Simsbury - at Tariffville Connecticut River - Connecticut River at a Glance - at Middle Haddam - at Montague - at Northampton - at Holyoke - Upper - at Holyoke - at Springfield - at Thompsonville - at Hartford Chicopee River - Chicopee River at a Glance - at Indian Orchard Westfield River - Westfield River at a Glance - at Westfield Farmington River - Farmington River at a Glance - at Unionville - at Simsbury - at Tariffville