US lakes & pondsUS lakes & pondsSurface area: The USGS National Hydrography Dataset outline (NHD Permanent ID 125294380, 2 mapped parts).
The red circle marks Keystone Lake.
Towns and counties: U.S. Census Bureau boundaries overlaid on the USGS lake outline.
Official PFBC 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.
Fish species listed by PFBC biologists as warmwater/coolwater fishing opportunities: Black crappie, Bluegill, Largemouth bass, Pumpkinseed, Tiger muskellunge, White crappie, Yellow perch.
Trout: PFBC stocked trout water, open to fishing year-round
Source: Pennsylvania Fish and Boat Commission (PFBC) warmwater/coolwater fisheries lakes and stocked trout waterbodies (via PASDA), record for Keystone Lake, Westmoreland County. See PFBC fishing for regulations and stocking schedules. Acreage here can differ slightly from our mapped outline.
Numbers on the map match the list at rightbelow.
Shoreline: USGS National Hydrography Dataset (NHD Waterbody, Permanent ID 125294380, plus 1 more mapped parts), public domain. State outline: U.S. Census Bureau TIGERweb. Points: PFBC fishing and boating access points and OpenStreetMap boat ramps (ODbL). Dashed trails: © OpenStreetMap contributors (ODbL). Interactive map: Leaflet with © OpenStreetMap contributors. Not for navigation.
OpenStreetMap shows about 1.7 mi of public hiking and walking trail within about 100 m (330 ft) of the Keystone Lake shoreline, mostly along the east shore. They follow about 75% of the shore, so you can walk most of the way around but not a full loop.
No trailhead is mapped for these trails. The closest public access site is Keystone State Park Lake, right on a shoreline trail (PA Fish & Boat Commission access data).
The dashed brown line on the lake map shows these trails. We include paths, footways and marked trails that OpenStreetMap doesn't mark as private, and leave out roads, sidewalks and snowmobile corridors. Mapped trails can still cross private land or close for the season, and not every trail is mapped, so follow posted signs.
Trails: © OpenStreetMap contributors, available under the Open Database License (ODbL). Map data as of Oct 9, 2026. Trail lengths count only the parts within about 100 m of the USGS NHD lake outline.
We found 7 campgrounds and RV parks within 15 miles of Keystone Lake, 4 of them within 5 miles. 2 are right on the shore. Distances are straight-line from the nearest point on the shoreline, so driving distance is longer.
RVs welcome · Tent sites
RVs welcome
Electric hookups · RVs welcome · Tent sites · Dogs allowed
All campgrounds & RV parks in Pennsylvania
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: Recreation.gov (RIDB) · OpenStreetMap contributors (ODbL). Pulled Oct 12, 2026.
Live from the National Weather Service API for the lake's coordinates (40.3734, -79.3825). The nearest station may be several miles away. NWS forecast for Keystone Lake. 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.
2 public access sites listed, 2 with a boat ramp or trailer launch.
| Site | Town | Owner | Type | Parking | Fee | Uses | Map |
|---|---|---|---|---|---|---|---|
| Boat ramp | Derry | — | Boat ramp (OpenStreetMap) · Yes ramp | — | — | Boating | 40.3754, -79.3890 |
| Keystone State Park Lake | Derry | Bureau of State Parks | Boat ramp · Yes ramp | — | No fee | Boating | 40.3743, -79.3809 |
PFBC fishing and boating access points 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 Keystone Lake not marked private, residents-only or members-only.
| Beach | Type | Access | Directions |
|---|---|---|---|
| Keystone Beach | Beach | Access not tagged; check posted rules | 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 Keystone Lake
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.
Keystone Lake covers about 57 acres in Derry, Pennsylvania (Westmoreland County).
Pennsylvania Fish and Boat Commission lists Largemouth bass, Black crappie, White crappie, Bluegill, Yellow perch, Pumpkinseed and Tiger muskellunge.
Yes. 2 public trailer launches are listed: Keystone State Park Lake 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 7 campgrounds and RV parks within 15 miles, 4 of them within 5 miles.
Keystone Lake touches Derry in Westmoreland County, Pennsylvania.
Know Keystone 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).
Straight-line distance between lake centers. All Pennsylvania lakes & ponds · All waters in Derry