New Hampshire’s smallmouth bass fly fishing spans three distinct river systems that offer very different experiences: the big, cold Connecticut River border water that rivals any New England fishery, the urban Merrimack corridor with its dam tailwaters and surprising bass populations, and the scenic Saco with its White Mountain backdrop and summer-only window. Together they provide accessible, quality fly fishing for smallmouth throughout the state’s warm season.
The common thread is that all three rivers fish best in June and July — post-spawn bass are aggressive, water temperatures are in the productive 65–75°F range, and flows are typically sufficient to keep fish comfortable and feeding. Crayfish patterns and Clouser Minnows are the most reliable producers, with poppers adding excitement during the evening low-light periods on the calmer pool sections. A 6-weight rod with 8 lb fluorocarbon handles most New Hampshire smallmouth situations.
Ranked by fly fishing character, access, and seasonal opportunity.
River #1
Best SeasonJune – Sept
Top FliesClouser Minnow, Deceiver
Leader / Tippet1X tippet
The Connecticut River forms New Hampshire’s western border with Vermont and provides the state’s most productive and extensive smallmouth bass fly fishing. The New Hampshire stretch from the Vermont line at Pittsburg south through Colebrook, Lancaster, Littleton, Woodsville, and Hanover holds consistent smallmouth populations in big-river water with ledge outcroppings, gravel bars, and deep pool sections. Fish average 12–16 inches with larger individuals common in the ledge pools, and the Connecticut’s clear, cold Connecticut Lakes-sourced water produces well-conditioned, fast-fighting bass.
Clouser Minnows and Deceivers are the Connecticut’s most productive fly choices for New Hampshire smallmouth — work Clousers through the current seams below the river’s granite ledge formations and along the gravel bar edges. Larger Deceivers and articulated streamers produce the bigger fish in the deeper, faster sections. The Connecticut is best fished by canoe or kayak, with numerous Connecticut River Byway access points along both the New Hampshire and Vermont banks providing float opportunities from a few hours to multiple days.
Pro Tip: The Connecticut River’s New Hampshire stretch is fishable from Pittsburg south, but the prime smallmouth water concentrates in the lower two-thirds of the state from Lancaster to Hanover. The Woodsville-Lisbon section offers excellent riffle-pool structure with good wade access at normal flows, and the confluence with the Ammonoosuc River near Lisbon creates productive mixed-current smallmouth habitat. Target the downstream faces of the river’s ledge outcroppings for the largest fish.
River #2
Best SeasonJune – Sept
Top FliesWoolly Bugger, Popper
Leader / Tippet8–10 lb fluorocarbon
The Merrimack River flows from Franklin through Concord, Manchester, and Nashua before crossing into Massachusetts — New Hampshire’s most populated and accessible river corridor. Despite its urban setting, the Merrimack holds surprisingly good smallmouth bass populations throughout its New Hampshire length, particularly in the rocky sections between the dams that create pools and current structure below each impoundment. The Merrimack’s tailwater sections below Franklin Falls Dam and Ayers Island Dam are the most productive fly fishing stretches.
Woolly Buggers and poppers cover most Merrimack smallmouth situations. Below each dam tailwater, Woolly Buggers stripped through the churned, oxygenated water produce aggressive strikes from bass holding in the current breaks. Poppers work well on the calmer pool sections between the faster tailwater stretches, especially in the evening hours when bass move out of their daytime lies. The Merrimack is primarily a float-fishing river — canoe and kayak launches exist at multiple points along Route 3 and Route 3A through Belknap and Merrimack counties.
Pro Tip: The Merrimack River’s best smallmouth fly fishing occurs in the sections immediately below dam tailwaters, where churned water creates oxygenated, food-rich habitat that concentrates bass. The Franklin Falls Dam tailwater is particularly productive — launch at the Lockes Hill access and fish downstream through the first mile of fast water, targeting the current seams and eddies that form around the large boulders dropped by spring floods over the years.
River #3
Best SeasonJune – Aug
Top FliesClouser Minnow, Streamer
Leader / Tippet8 lb fluorocarbon
The Saco River flows from Crawford Notch through North Conway, Conway, and Fryeburg before crossing into Maine — a clear, sandy-bottomed river with a scenic White Mountain setting and a respectable smallmouth bass population in its lower New Hampshire reaches. The section from Conway downstream through Fryeburg offers the most consistent smallmouth habitat, with a combination of sand and gravel bottom, the occasional rocky outcropping, and good summer bass populations that respond well to streamers and Clouser Minnows.
Clouser Minnows in chartreuse/white or olive/white are the Saco’s most reliable producers — work them along the current seams and around the woody debris and rock formations that break the river’s predominantly sandy bottom. Streamers in natural colors produce well in the deeper pool sections where bass hold during midday. The Saco is an excellent canoe river with multiple launch points and a gentle gradient that makes it accessible to most skill levels; the Conway to Fryeburg float covers the best smallmouth water in a leisurely full-day trip.
Pro Tip: The Saco River’s smallmouth season is compressed compared to the larger Connecticut — the river runs warm and low by late August, making late June and July the prime window. Fish the early morning hours when bass are most active in the shallows, targeting the gravel bars on the inside of each river bend and the woody debris jams that accumulate on the outside bends. Arrive early before recreational canoe traffic builds — the Saco is a popular paddling river and fishing is best in the first two hours of daylight.
New Hampshire Smallmouth Bass Fly Fishing — Frequently Asked Questions
What is the best time of year to fly fish for smallmouth bass in New Hampshire?
The prime season for smallmouth bass fly fishing in New Hampshire runs from June through September on most rivers. The Connecticut River can fish productively from late May through early October. The Saco River and Merrimack tend to peak in late June and July before late-summer low water and heat reduce activity. Post-spawn smallmouth in late June are the most aggressive and catchable fish of the year on all three rivers.
What flies work best for New Hampshire smallmouth bass?
Clouser Minnows and Deceivers are the most consistent producers for New Hampshire smallmouth on the Connecticut River’s bigger water. Woolly Buggers and poppers cover the Merrimack’s tailwater and pool sections effectively. Streamers in natural minnow colors work well on the Saco’s clearer water. Carry Clouser Minnows in chartreuse/white and olive/white (#2–6), a Woolly Bugger, and a foam popper for a complete New Hampshire smallmouth kit.
Do I need a fishing license to fly fish for smallmouth bass in New Hampshire?
Yes. New Hampshire Fish and Game requires a fishing license for all anglers 16 and older. Non-resident licenses are available in annual and short-term formats. New Hampshire has a year-round open season for black bass on most rivers with standard bag limits. The Connecticut River requires either a New Hampshire or Vermont fishing license for fishing from a boat on the main channel — verify current regulations with NH Fish and Game before your trip.
What gear do I need for fly fishing New Hampshire smallmouth bass rivers?
A 6-weight fly rod handles most New Hampshire smallmouth situations, though a 7-weight is more comfortable for the Connecticut River’s bigger water and larger fish. Use 8–10 lb fluorocarbon tippet for the Merrimack and Saco; 1X tippet is appropriate for the Connecticut’s larger fish. A weight-forward floating line covers most New Hampshire smallmouth water; a sink-tip adds useful depth capability on the Connecticut’s ledge pools and the Merrimack’s dam tailwaters.
