Round Valley Reservoir (NJ): Motor and Boating Rules
Hunterdon County · near Lebanon · managed by New Jersey Division of Parks and Forestry
- Gas outboard YES
- Electric trolling YES
- PWC / jet ski NO
- Hunterdon County, NJ
- 2,271 acres
- 10 hp cap
- New Jersey Division of Parks and Forestry
Quick answer
Round Valley Reservoir carries a 10 hp cap. The rated horsepower on your motor's plate is what counts. Common portables — 2.5 to 9.9 hp — fit under it. Round Valley Reservoir in NJ is limited to outboard motors of 10 horsepower or less under New Jersey Division of Parks and Forestry regulations (verified July 26, 2026). Rules change and local ordinances may add restrictions — always confirm with New Jersey Division of Parks and Forestry before you launch.
Rules at a glance
Plate rating counts — motors rated above 10 hp are over the cap even at idle.
What this means in practice
Horsepower-capped water self-selects its traffic: tiller boats, canoes with square sterns, and small pontoons instead of bass boats at full song. Expect calm water and slow trolling passes on Round Valley Reservoir, and rig accordingly — long drifts and finesse presentations work here.
Shopping for a motor that fits the rule? Match the plate to the cap with margin — a 10 hp limit is exactly satisfied by the biggest motor rated at or under it, and no throttle discipline makes an oversized plate legal. Electric trolling motors are always inside the cap.
Worth knowing about Round Valley Reservoir: Round Valley Recreation Area; 2,271-acre water-supply reservoir. N.J.A.C. 7:2-8.3(b) caps motors at 10 horsepower and N.J.A.C. 7:2-8.2(b) prohibits motorized jet skis; park page confirms motor boating (electric and gas, 10 horsepower limit). Sailboat masts limited to 30 feet (7:2-8.4); all boating stops when winds reach 25 mph (7:2-8.8)..
If this water doesn't fit your boat, compare Parvin Lake (Electric only, Salem County) or Shepherd Lake (Electric only, Passaic County) — or scan all verified New Jersey lake motor rules to filter by restriction type before you hitch up.
Common mistakes on HP limit water
Counting on throttle discipline. The cap on Round Valley Reservoir reads the plate, not your wrist: a big motor at idle is still over the limit on most waters of this class.
Assuming enforcement is lax on small water. Capped lakes are exactly where officers check plates, because the violation is visible from the dock.
Before you launch — verify
- Read the current regulation yourself: New Jersey Division of Parks and Forestry
- A two-minute call to the New Jersey Division of Parks and Forestry office for Hunterdon County settles anything this page leaves open.
- This summary was last checked against the source on .
Rules change and local ordinances may add restrictions — always confirm with New Jersey Division of Parks and Forestry before you launch.
Frequently asked questions
Are gas motors allowed on Round Valley Reservoir?
Yes — up to the 10 hp cap. The rated horsepower on the plate decides it, not your throttle discipline. Verified July 26, 2026.
Can I use an electric trolling motor on Round Valley Reservoir?
Yes — trolling motors are legal on Round Valley Reservoir. Size the motor to your hull, bring enough battery for the day, and check this page's notes for any lake-specific motor conditions.
Are jet skis (PWC) allowed on Round Valley Reservoir?
Jet skis are out on Round Valley Reservoir. No production PWC comes in under the 10 hp limit.
Who enforces boating rules on Round Valley Reservoir?
Rule-making for Round Valley Reservoir sits with New Jersey Division of Parks and Forestry (state department of natural resources), with possible additional ordinances from Hunterdon County or local municipalities. On the water, expect enforcement from state boating officers and the county sheriff's marine unit alike.
Where do I verify the current rules for Round Valley Reservoir?
Use the official document linked in the Sources section of this page — it is what this summary is based on — or go to New Jersey Division of Parks and Forestry directly. We last verified this page against the source on July 26, 2026.