Alder Lake is a lake in Ashburn, Virginia.

How is Alder Lake rated?

Alder Lake in Ashburn, Virginia has an average visitor rating of 4.7 out of 5, based on 17 reviews.

Updated August 13, 2025

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Photo: Campground panorama (Alder Lake Pk) by Chris Light (CC BY-SA 4.0) License

Alder Lake

Lake · Ashburn, Virginia

4.7(17 reviews)

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Weather at Alder Lake

45°F, Clear · H 68° / L 45° · 3% chance of rain3-day forecast

H: 68° L: 45°

Clear

45°

Feels like 42°

Precipitation

Humidity

61%

Wind

7 mph

UV Index

12 AM

48°

3 AM

46°

6 AM

45°

9 AM

51°

12 PM

65°

3 PM

68°

6 PM

59°

9 PM

52°

Frequently asked questions

Where is Alder Lake?: Alder Lake is a lake in Ashburn, Virginia.
Can you swim at Alder Lake?: There is no fixed answer for Alder Lake: whether it is safe to swim there on a given day depends on the water temperature, recent rainfall, and any advisories posted at Alder Lake in Ashburn, Virginia. Check current water conditions before you go, and follow posted signs and local guidance.
How is Alder Lake rated?: Alder Lake in Ashburn, Virginia has an average visitor rating of 4.7 out of 5, based on 17 reviews.

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Location & Contact

Ashburn, VA 20147

Ashburn, Virginia 20147

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🏞️ Best times & visiting tips

›Check for boat launch facilities and fees
›Obtain required fishing licenses before arrival
›Be aware of lake-specific regulations and restrictions
›Monitor water quality reports before swimming

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