Lake Champlain Smallmouth Stir as Round Goby Study Flags New Threat

What's Biting

What's Next

With the Connecticut River system running at 136 cfs — low and clear by early-May standards — wade fishing conditions should remain favorable across Vermont's accessible river runs over the coming days. Low, clear water calls for lighter tippets and careful approach angles: anglers targeting brown trout on Connecticut River tributaries or Battenkill feeder streams should drop to 5X–6X and lean on emerging caddis and sulphur patterns. Hatch Magazine recently published a deep look at fishing caddis emergences, and the Battenkill Fly Fishing & Arts Festival crowd (per MidCurrent) was actively on the water through May 2 finding the season well underway — both signals pointing to hatches firing across Vermont's mid-elevation streams.

For smallmouth bass, Lake Champlain's shallow bays should be at or approaching peak pre-spawn staging. Focus on rocky transition zones — points, shallow flats adjacent to deeper water, and windward shores where perch and shad baitfish concentrate early in the morning. Tube jigs, finesse creature baits, and small suspending jerkbaits all produce during the pre-spawn window. Dawn sessions tend to be the most consistent before midday sun pushes fish off structure.

Keep an eye on the Connecticut River shad run. The migration typically builds through May in Vermont's middle and upper river reaches. No current source confirms a Vermont-stretch arrival yet, but at 136 cfs the river is wading-accessible and well-suited for anglers swinging small darts and weighted shad flies through current seams below deeper pools — worth a morning session if you're in the region.

The waning gibbous moon on May 6 extends low-light feeding windows around both moonrise and moonset; stacking those windows with your dawn and dusk access timing can pay dividends on Champlain's shallow coves. Weekend anglers (May 9–10) should find flows stable to slightly declining absent significant rain; check USGS gauge 01135300 in real time before heading out.

Context

Early May in Vermont typically marks the transition out of peak spring runoff into the first stable, low-water period on the Connecticut River system. Snowmelt and April rains generally push runoff to its seasonal peak in late March through mid-April; by the first week of May, flows are usually receding toward wading-friendly levels. The 136 cfs reading at USGS gauge 01135300 on May 6 is consistent with that post-runoff pattern, though without multi-year gauge averages in the current data payload it's impossible to state precisely whether this is an early, late, or on-schedule drawdown.

Lake Champlain's bass fishery has a well-established competitive pedigree. MA Bass tournament records document productive spring events on the lake, and Champlain regularly draws regional circuits for its trophy-class smallmouth. May is historically the heart of the pre-spawn window there, when a warm weather window can produce exceptional shallow-water action.

The round goby development — highlighted by Wired 2 Fish — adds an unusual backdrop to this spring. The species has already established itself in the Hudson drainage and parts of the St. Lawrence system. On The Water's podcast with Captain Joe Fonzi addresses how goby-driven forage has produced noticeably larger smallmouth in Lake Erie, where the fish has been established for decades; the transition period when an invasive first arrives is far less predictable, however. Vermont anglers and boaters should practice clean-drain-dry protocols at every Champlain launch as a precaution.

For fly anglers, the Battenkill Fly Fishing & Arts Festival's fifth consecutive year in Arlington, VT (per MidCurrent) signals that the spring hatch calendar is running on its usual schedule — a reliable community barometer that the season is neither significantly early nor late entering the first week of May.