US lakes & pondsUS lakes & pondsJefferson · Hopatcong · Mount Arlington · Roxbury, New Jersey — Morris County.
Surface area: The USGS National Hydrography Dataset outline (NHD Permanent ID 167295447).
The closest airport with scheduled passenger flights to Lake Hopatcong, 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.
The red circle marks Lake Hopatcong.
Towns and counties: U.S. Census Bureau boundaries overlaid on the USGS lake outline.
Official NJ Fish & Wildlife pages. Rules and fees change; check before you go.
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.
Numbers on the map match the list at rightbelow.
Shoreline: USGS National Hydrography Dataset (NHD Waterbody, Permanent ID 167295447), 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.
We found 9 campgrounds and RV parks within 15 miles of Lake Hopatcong, 3 of them within 5 miles. Distances are straight-line from the nearest point on the shoreline, so driving distance is longer.
Electric hookups · RVs welcome · Tent sites · Dump station
RVs welcome · Tent sites · Showers · Toilets
All campgrounds & RV parks in New Jersey
Green tent icons on the lake map mark campgrounds near the shore, and the interactive map shows the closest 12. Amenities are listed only where a source records them; call or check the campground's website before you go, since seasons and rates change every year.
Campground data: OpenStreetMap contributors (ODbL). Pulled Oct 12, 2026.
Live from the National Weather Service API for the lake's coordinates (40.9467, -74.6366). The nearest station may be several miles away. NWS forecast for Lake Hopatcong. No live water-temperature sensor is shown because we haven't found a public one for this lake.
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.
3 public access sites listed, 3 with a boat ramp or trailer launch.
| Site | Town | Owner | Type | Parking | Fee | Uses | Map |
|---|---|---|---|---|---|---|---|
| Boat ramp | Roxbury | — | Boat ramp (OpenStreetMap) · Yes ramp | — | — | Boating | 40.9096, -74.6571 |
| Boat ramp | Roxbury | — | Boat ramp (OpenStreetMap) · Yes ramp | — | — | Boating | 40.9046, -74.6639 |
| Hopatcong State Park Boat Launch | Roxbury | — | Boat ramp (OpenStreetMap) · Yes ramp | — | — | Boating | 40.9177, -74.6634 |
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.
On OpenStreetMap: 1 beach or swimming spot on the shore of Lake Hopatcong not marked private, residents-only or members-only.
| Beach | Type | Access | Directions |
|---|---|---|---|
| Beach (unnamed on OpenStreetMap) | Beach area | Access not tagged; check posted rules; fee; lifeguards (seasonal) | Get directions |
Beaches: © OpenStreetMap contributors (ODbL), within about 150 m (500 ft) of the lake outline. A mapped beach is not a guarantee that swimming is allowed, supervised or safe; some town beaches need a resident sticker even when the map doesn't say so. Check posted rules and water-quality advisories before you swim.
Reported on or near Lake Hopatcong
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.
Lake Hopatcong covers about 2,493 acres in Jefferson, Hopatcong, Mount Arlington and Roxbury, New Jersey (Morris County).
Yes. 3 public trailer launches are listed: Hopatcong State Park Boat Launch, Boat ramp and Boat ramp. Check posted fees and parking rules.
OpenStreetMap shows 1 public beach or swimming spot on the shore. None of our sources lists a lifeguard, so swim at your own risk and follow posted rules.
Yes. We list 9 campgrounds and RV parks within 15 miles, 3 of them within 5 miles.
Lake Hopatcong touches Jefferson, Hopatcong, Mount Arlington and Roxbury in Morris County and Sussex County, New Jersey.
Know Lake Hopatcong? 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).
Straight-line distance between lake centers. All New Jersey lakes & ponds · All waters in Jefferson