Top 8 Lakes in Mercer County
Best lakes in Mercer County, New Jersey, offer diverse recreational opportunities centered around their aquatic features. This region features several man-made lakes, many of which are integrated into larger park systems. These lakes provide settings for activities such as rowing, fishing, and hiking along their banks. The natural landscape includes varied habitats, attracting wildlife and offering scenic views for visitors.
Best lakes in Mercer County
- The most popular lakes is Mercer County Park, a facilities area that encompasses over 2,500 acres. This park offers a variety of outdoor recreation experiences, including picnic areas, volleyball courts, and interconnected trails.
- Another must-see spot is Lake Carnegie (New Jersey), a lake built in the early 1900s for Princeton’s rowing team. Visitors can fish, paddle, or stroll along its banks.
- Visitors also love Billy Johnson Mountain Lakes Nature Preserve, a nature reserve with dirt trails winding past lakes and streams. It is a quiet, wooded area suitable for running, walking, or biking, with opportunities to spot birdlife.
- Mercer County is known for its man-made lakes, many of which are used for rowing and fishing, and lakes integrated into park systems. The area offers a variety of lakes to see and explore, each with distinct features and activities.
- The lakes in Mercer County are appreciated by the komoot community, with 8 highlights and 10 photos available.
Last updated: April 28, 2026
Carnegie Lake Dam
Highlight • Monument
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Mercer County Park
Highlight • Rest Area
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Meadow/Pond Trail
Highlight • Trail
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Charles H. Rogers Wildlife Refuge
Highlight (Segment) • Natural
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Lake Carnegie (New Jersey)
Highlight • Lake
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Billy Johnson Mountain Lakes Nature Preserve
Highlight • Lake
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Lakeside trail
Highlight (Segment) • Trail
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Mercer County Park boathouse
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Popular around Mercer County
East Coast Greenway — An unforgettable ride along the Atlantic Seaboard
On the trail of the Pilgrim Fathers – road trip along the Atlantic coast
Hiking in Mercer County
Running Trails in Mercer County
Cycling in Mercer County
Road Cycling Routes in Mercer County
Gravel biking in Mercer County
MTB Trails in Mercer County
Tips from the Community
Billy Johnson Mountain Lakes Nature Preserve is a quiet, wooded area with dirt trails winding past lakes and streams. It’s great for a run, walk, or even a bike ride. You’ll have a chance to spot birdlife along the way, with plenty of spots to pause and take in the peaceful surroundings. Also a good place to bring your dog.
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Carnegie Lake, stretching across parts of central New Jersey, owes its existence to an unusual encounter: a conversation between a painter and Andrew Carnegie. Built in the early 1900s for Princeton’s rowing team, the lake quickly became more than just a training site. Locals fish here, paddle, or stroll along the quiet banks. Pollution has taken its toll, but efforts to clean the water are ongoing.
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Built in 1907 at the meeting point of Stony Brook and Millstone River, the Lake Carnegie dam created the lake enjoyed by rowers and the community. After a century of upkeep, repairs were needed again in 2015. This is a great place to watch races.
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Mercer County Park offers a variety of outdoor recreation experiences. From picnic areas to volleyball courts to trails, this park encompasses over 2,500 acres and is free to the public. Many of the trails interconnect and can be confusing so having a map or GPS can come in handy for navigation purposes.
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Your run takes you right past the Boathouse at Mercer Lake, which was recently renovated with 19-foot vaulted ceilings inside, tasteful stonework outside, and a long dock jutting into the lake. This is a popular venue for weddings.
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Right about here, you'll see a turnoff for the Meadow/Pond Trail. Although it's one of the most popular trails in this area, you may want to leave it for the hikers — it tends to be very muddy.
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Mercer County Park offers a variety of outdoor recreation experiences. From picnic areas to volleyball courts to trails, this park encompasses over 2,500 acres and is free to the public. Many of the trails interconnect and can be confusing so having a map or GPS can come in handy for navigation purposes.
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Mercer County Park offers a variety of outdoor recreation experiences. From picnic areas to volleyball courts to hiking trails, this park encompasses over 2,500 acres and is free to the public. Many of the trails interconnect and can be confusing so having a map or GPS can come in handy for navigation purposes.
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Frequently Asked Questions
What outdoor activities can I enjoy around the lakes in Mercer County?
Mercer County's lakes offer a variety of outdoor activities. You can explore extensive trail systems for hiking and biking, particularly at Mercer County Park. Many lakes are popular for fishing, paddling, and boating. For specific routes, you can find easy hikes and gravel biking trails in the region, such as those listed in the Easy hikes in Mercer County and Gravel biking in Mercer County guides.
Are there family-friendly lakes or activities in Mercer County?
Yes, several lakes in Mercer County are great for families. Mercer County Park offers picnic areas, volleyball courts, and trails suitable for all ages. The Billy Johnson Mountain Lakes Nature Preserve is also family-friendly, with quiet wooded trails. In Pennsylvania, Shenango River Lake and Lake Wilhelm provide opportunities for swimming, boating, and picnicking.
Which lakes are best for fishing in Mercer County?
Fishing is a popular activity across Mercer County's lakes. In Pennsylvania, Shenango River Lake is known for hybrid striped bass, white bass, and crappies, while Lake Wilhelm offers diverse species. In New Jersey, Mercer Lake (within Mercer County Park) is well-stocked with Largemouth Bass, White Crappie, Bluegill, and even large Muskie. Lake Carnegie also attracts local anglers.
Can I bring my dog to the lakes in Mercer County?
Yes, some areas around Mercer County lakes are dog-friendly. For example, the Billy Johnson Mountain Lakes Nature Preserve is a good place to bring your dog for a walk on its trails. Always check local regulations for specific lakes and parks regarding leashes and designated pet areas.
What kind of wildlife can I expect to see around Mercer County lakes?
Mercer County lakes are rich in wildlife. At Shenango River Lake (PA), you might spot bald eagles and herons. Lake Wilhelm (PA) is known for waterfowl, eagles, and osprey due to its diverse habitats. The Charles H. Rogers Wildlife Refuge in New Jersey is a haven for various bird species, insects, and plants, thanks to its large marsh and nearby woods.
Are there historical or notable features associated with any Mercer County lakes?
Yes, some lakes have significant historical ties. Lake Carnegie in New Jersey was built in the early 1900s specifically for Princeton's rowing team. In Ohio, Grand Lake St. Marys holds the distinction of being the largest man-made lake in the world when it was constructed in the 1840s as a feeder for the Miami-Erie Canal.
What are the best lakes for boating or kayaking in Mercer County?
Many lakes in Mercer County are suitable for boating and kayaking. Shenango River Lake (PA) offers ample space for various water sports, including jet skiing and paddleboarding, with six boat ramps. Lake Wilhelm (PA) is also popular with boaters. In New Jersey, Mercer Lake is a prime location, famously used by the US Olympic Rowing Team, and offers boat launches and marina rentals. Grand Lake St. Marys (OH) is also a major destination for boating.
Are there any scenic viewpoints or natural features to explore around the lakes?
Absolutely. The lakes offer numerous scenic spots. Shenango River Lake (PA) provides scenic views and opportunities for wildlife viewing. Lake Wilhelm (PA) is encircled by a 12.2-mile paved trail, offering picturesque perspectives of the lake and its diverse habitats. The Billy Johnson Mountain Lakes Nature Preserve features dirt trails winding past lakes and streams, perfect for enjoying peaceful surroundings.
What is the best time to visit the lakes in Mercer County?
The best time to visit depends on your preferred activities. Spring and fall offer pleasant temperatures for hiking and wildlife viewing. Summer is ideal for water sports like swimming, boating, and fishing. Some lakes, like Shenango River Lake (PA), are popular year-round for fishing. Always check specific park hours and seasonal conditions before your visit.
Are there trails around the lakes suitable for easy walks?
Yes, there are many options for easy walks. Mercer County Park has interconnected trails, and the Billy Johnson Mountain Lakes Nature Preserve offers quiet, wooded dirt trails. Lake Wilhelm (PA) features a 12.2-mile paved trail that encircles the lake, suitable for walking and biking. You can find more details on easy routes in the Easy hikes in Mercer County guide.
Where can I find information about permits for boating or fishing?
Permit requirements for boating and fishing vary by state and specific lake. For lakes in Pennsylvania like Shenango River Lake and Lake Wilhelm, you would typically need a Pennsylvania fishing license and follow state boating regulations. For New Jersey lakes such as Mercer Lake and Lake Carnegie, New Jersey fishing licenses and boating permits are required. It's always best to check the official websites of the respective state's fish and wildlife agencies or park services for the most current information.
Are there any lakes in Mercer County known for their unique geological features?
Yes, Sandy Lake in Mercer County, Pennsylvania, is notable for its geological origins. It is one of eight major glacial lakes in western Pennsylvania, formed by melting glaciers, making it a unique natural feature in the region.
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