Round Valley Reservoir

Hunterdon County, New Jersey

Round Valley Reservoir is a deep, clear water supply reservoir near Lebanon in Hunterdon County. It is New Jersey's best lake trout water and also holds big brown and rainbow trout.

Air temp in Lebanon, NJ Loading current temperature…

Map data © OpenStreetMap contributors.

Current air temperature at Round Valley Reservoir (National Weather Service) ↗

Surface area2,350 acres

Max depth180 ft

Shoreline—

Boat motors9.9 horsepower max

Species

Fishery rating out of 5.

Lake Trout●●●●●

The state record lake trout came from here.

Brown Trout●●●●○

Fish 20 to 50 feet down with slip floats or flat lines.

Rainbow Trout●●●●○

Shorelines and inlets in cool months, deeper water in summer.

Smallmouth Bass●●●○○

Rock, gravel and points. Tubes, jerkbaits and drop-shots.

Largemouth Bass●●●○○

Weeds, docks and wood in the shallows.

When they bite

Month-by-month activity for each target species.

	J	F	M	A	M	J	J	A	S	O	N	D
Lake Trout
Brown Trout
Rainbow Trout
Smallmouth Bass

SlowFairGoodHot

Boat launches

2 launch sites. Fees and hours change, so confirm before you go.

Round Valley Boat LaunchPublic
NJ Fish and Wildlife launch north of the day use area; fishing license or launch permit required, 10 hp maxDirections ↗
More public accessPublic
See New Jersey Fish & Wildlife or the lake manager's website for all ramps and feesDirections ↗

Size & creel limits

Special rules for this lake, confirmed from official state regulations. Minimum size and daily limit.

Species	Min size	Daily limit
Largemouth Bass Lunker Bass Lake	15 in	3 / day combined
Smallmouth Bass Lunker Bass Lake	15 in	3 / day combined
Lake Trout Open year-round; 9 total	15 in (8/day 15 to <24 in)	8 / day + 1 (24 in or longer)

Other species in this lake: look up the limits at New Jersey Division of Fish and Wildlife (NJDEP) ↗

Verified October 2026. Rules change, so confirm current limits with the New Jersey Division of Fish and Wildlife (NJDEP) before you fish.

Bait & tackle nearby

Closest shops to the lake and its boat launches. Call ahead for live bait and hours.

Round Valley Bait & TackleNearby
1271 US Highway 22, Lebanon, NJDirections ↗
The Sporting LifeNearby
653 US Hwy 22 E, Whitehouse Station, NJ(908) 923-4331 Directions ↗

Search more bait shops near Round Valley Reservoir ↗

Local tips

In summer, fish lake trout near the bottom in the deep, cold water with herring or trolled spoons.
Use downriggers or lead core line to reach suspended trout.
Boats are limited to 9.9 horsepower, and flashing ramp lights mean high winds and no boating.

Angler reports

Water temp, what's biting, and anything else other anglers should know about Round Valley Reservoir.

Loading reports...

View on interactive map

Zoom and pan on a street, satellite or terrain map. Red pins are boat launches.