Best lakes around Ashton-Sandy Spring include several notable reservoirs and lakes that provide diverse recreational opportunities. The area is characterized by its protected natural environments, including forested lands and water bodies that serve as vital drinking water sources. These lakes offer a range of outdoor activities within a natural landscape. The region's geography features significant water bodies like the Triadelphia Reservoir and Rocky Gorge Reservoir, formed by dams on the Patuxent River.
Last updated: June 25, 2026
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Lake Needwood is a beautiful 75-acre lake at the start of the Rock Creek Trail. The lake is popular with boaters, swimmers and fishermen. It is a great place for a break on your ride to take a dip to cool down.
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The 800-acre reservoir is situated directly behind the Brighton Dam on the Patuxent River. You can enjoy a nice view of the reservoir from the sidewalk along the dam.
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This area offers several spots for fishing, picnicking, or just enjoying the surroundings. The lake is regularly stocked with fish for fishing, but make sure you have the proper fishing license to do so.
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This lake was formed in 1965 by damming Rock Creek. The purpose was to control floods and reduce soil erosion. You can rent pedal boats, rowboats, and canoes here. There are also plenty of picnic areas where you can enjoy the scenic views of the lake.
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Built in 1943, Brighton Dam allowed the formation of Triadelphia Reservoir. The lake holds an incredible amount of water – 6.3 billion gallons to be precise! Around the dam and reservoir, you can enjoying hiking, picnicking, horseback riding, boating, fishing and hunting (permit required).
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A gentle climb from the Rock Creek Trail up to Lake Bernard Frank. Well paved trail suitable for all riders.
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Top of the Rock Creek Trail, it is all downhill into DC from here.
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The lakes in the Ashton-Sandy Spring area offer a wide range of activities. You can enjoy shore fishing and boat fishing, picnicking, hiking, and horseback riding on designated trails. Boating is popular, with options for rowboats, canoes, kayaks, and sailboats. Some lakes, like Lake Needwood, also offer rentals for canoes, rowboats, and pedal boats, or pontoon boat tours.
Yes, several lakes are great for families. Lake Needwood is a popular choice, offering boat rentals, picnicking, and trails within Rock Creek Regional Park. Pine Lake is also family-friendly, with amenities like playgrounds and walking trails surrounding the lake, in addition to fishing and picnicking spots.
For activities like boating, fishing, hiking, and horseback riding at the Triadelphia and Rocky Gorge Reservoirs, a WSSC Watershed Use Permit is required. This permit costs $6 daily or $70 annually, with free access for individuals under 16 or over 64 years of age. It's advisable to check the official WSSC website for the most current permit information.
The area around Ashton-Sandy Spring offers numerous trails for hiking and cycling. For hiking, you can explore routes like the 'Underground Railroad Experience Trail' or the 'Browns Bridge and Rocky Gorge Reservoir' trail. Cyclists can enjoy routes such as the 'Lake Needwood Southeast Shore – Lake Bernard Frank loop' or the 'Matthew Henson Trail'. You can find more details and routes in our guides for hiking and cycling around Ashton-Sandy Spring.
While many trails in the region are dog-friendly, it's always best to check specific park regulations for each lake. Generally, dogs are permitted on trails if kept on a leash, but some areas, especially around reservoirs that serve as drinking water sources, might have stricter rules or restricted access for pets. Always look for signage or official park websites before visiting.
The protected natural environments around the lakes are home to diverse wildlife. At Triadelphia Reservoir and Rocky Gorge Reservoir, you might spot bald eagles, herons, deer, and foxes. Lake Needwood, nestled within Rock Creek Regional Park, also offers abundant wildlife viewing opportunities within its woodlands.
Yes, Lake Bernard Frank offers a well-paved trail that is suitable for all riders and is noted as wheelchair accessible. This gentle climb from the Rock Creek Trail provides an inclusive option for enjoying the natural beauty of the area.
The lakes offer beauty year-round, but spring and fall are particularly scenic. In late April and early May, the Brighton Dam Azalea Gardens at Triadelphia Reservoir burst into bloom with approximately 26,000 azalea plants. Fall brings vibrant foliage, making it an excellent time for hiking and enjoying the colors. Summer is ideal for boating and water activities, while winter offers peaceful walks.
Yes, both Triadelphia Reservoir and Rocky Gorge Reservoir offer designated trails for horseback riding. Rocky Gorge Reservoir is particularly praised for its 'magnificent' horseback riding trails, providing a unique way to explore the forested greenways and scenic coves.
While Lake Needwood is popular with swimmers, the Triadelphia and Rocky Gorge Reservoirs primarily serve as vital drinking water sources. For these reservoirs, recreational activities are generally limited to boating and fishing, with swimming typically not permitted to protect water quality. Always check local regulations for specific swimming allowances.
Triadelphia Reservoir is unique for its combination of natural beauty and historical significance. Formed by the Brighton Dam in 1943, it's an 800-acre reservoir surrounded by 4,000 acres of protected forest. It features the nationally acclaimed Brighton Dam Azalea Gardens, which are stunning in spring, and offers extensive opportunities for fishing, boating, hiking, and wildlife viewing, including bald eagles.
The lakes are popular fishing spots. At Rocky Gorge Reservoir, you can find walleye, bream, bluegill, crappie, perch, trout, bass, catfish, pike, and muskie. Pine Lake is regularly stocked with fish like largemouth bass, bluegill, and rainbow trout. Remember to have the proper fishing license before you cast your line.


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