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Rosedale Lake

Hopewell, New Jersey — Mercer County.

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30Surface acres
1Public access sites

Surface area: The USGS National Hydrography Dataset outline (NHD Permanent ID 64664628).

Nearest airports

The closest airport with scheduled passenger flights to Rosedale Lake, plus larger airports within about 150 miles:

Car rental links go to our partner Discover Cars; LakeRipple may earn a commission at no extra cost to you. Affiliate disclosure.

Airports with scheduled airline service from OurAirports (large and medium airports); larger airports are FAA large, medium and small hubs by FAA CY2025 enplanements ("major airport" = FAA large hub). Distances are straight-line from the lake's center, not driving distance; road routes are longer.

Location & fast facts

Where Rosedale Lake is in New Jersey

The red circle marks Rosedale Lake.

Fast facts

About Rosedale Lake

  • County: Mercer
  • Town: Hopewell
  • Mapped as: Reservoir (USGS National Hydrography Dataset)
  • Distance: about 42 mi from Newark and 8 mi from Trenton and 35 mi from Morristown and 69 mi from Atlantic City, straight-line (not driving distance)

Towns and counties: U.S. Census Bureau boundaries overlaid on the USGS lake outline.

Fishing in New Jersey

Official NJ Fish & Wildlife pages. Rules and fees change; check before you go.

Good for & watch for

Good for

  • Boating. 1 public trailer launch listed (see access)

Watch for

  • Non-native/invasive species. Water chestnut recorded. Clean, drain and dry your boat and gear.
  • Boat traffic. A public trailer launch means motorboats share the water; expect more traffic on summer weekends.

Built only from the data on this page: official access lists, OpenStreetMap beaches and trails, campground listings, state and USGS invasive-species records. We don't rate crowds or water quality.

Lake map

Rosedale Lake shoreline, boat launches & beaches

Kayak Launch (Boat launch)1¼ mileN

Numbers on the map match the list at rightbelow.

Boat launch
  1. 1Kayak Launch
    Boat launch · Hopewell

Shoreline: USGS National Hydrography Dataset (NHD Waterbody, Permanent ID 64664628), public domain. State outline: U.S. Census Bureau TIGERweb. Points: OpenStreetMap boat ramps (no statewide agency ramp layer used) and OpenStreetMap boat ramps (ODbL). Interactive map: Leaflet with © OpenStreetMap contributors. Not for navigation.

Conditions right now

Air temperature & conditions (nearest NWS station)Loading…
Fetching the latest National Weather Service observation…

Live from the National Weather Service API for the lake's coordinates (40.3290, -74.7560). The nearest station may be several miles away. NWS forecast for Rosedale Lake. No live water-temperature sensor is shown because we haven't found a public one for this lake.

Sun, moon & best fishing times

Sun & moon at Rosedale Lake

Best fishing times

Major periodMinor periodDaylight

    Based on solunar theory, an estimate. Major periods (about 2 hours) center on when the moon is directly overhead or underfoot; minor periods (about 1 hour) center on moonrise and moonset. The 0–100 activity score rises during those periods and gets a boost near sunrise and sunset and around the new and full moon. Weather, water temperature and pressure often matter more. Sun and moon times are calculated in your browser from the lake's coordinates with standard astronomy formulas, shown in ET (America/New_York), and accurate to within a few minutes.

    Boat launches & access sites

    1 public access site listed, 1 with a boat ramp or trailer launch.

    SiteTownOwnerTypeParkingFeeUsesMap
    Kayak LaunchHopewell—Boat ramp (OpenStreetMap) · Yes ramp——Boating40.3317, -74.7571

    OpenStreetMap boat ramps (no statewide agency ramp layer used) and OpenStreetMap boat ramps (ODbL)

    Fees, hours and rules change; confirm with the site owner before you go.

    Non-native/invasive species

    Reported on or near Rosedale Lake

    Clean, Drain, Dry. Remove plants and mud, drain all water, and dry your boat, trailer and gear before moving to another water.

    USGS Nonindigenous Aquatic Species database

    USGS records matched to this water by location (within about 150 m of the outline) or by the place name in the record. A record shows a sighting was reported; it doesn't prove the species is still there. As of Oct 10, 2026.

    Contact & official info

    Questions about Rosedale Lake

    How big is Rosedale Lake?

    Rosedale Lake covers about 30 acres in Hopewell, New Jersey (Mercer County).

    Is there a public boat launch on Rosedale Lake?

    Yes. 1 public trailer launch is listed: Kayak Launch. Check posted fees and parking rules.

    What towns are on Rosedale Lake?

    Rosedale Lake touches Hopewell in Mercer County, New Jersey.

    Share a tip or fishing report

    Know Rosedale Lake? Tell us about the launch, parking, where they're biting or anything a first-time visitor should know. Tips go privately to the LakeRipple editor; nothing is posted automatically. Helpful tips may be featured on this page (we'll use your first name only if you give one).

    Lakes & ponds nearby

    Straight-line distance between lake centers. All New Jersey lakes & ponds · All waters in Hopewell