61° · Mostly clear nowSunshine pairs well with doing very little.
Park
Lake Mercer Dam
- 4.781 reviews
- Free
- Open now
Fairfax County park with a paved trail around the Lake Mercer dam, used for walking and biking.
Quick answers
Lake Mercer Dam in short
When is Lake Mercer Dam open?
Open 24 hours, every day. Hours checked on 4 November 2026.
When is the best time to visit Lake Mercer Dam?
It's at its best mornings and afternoons. Go in daylight. Wedar also scores every hour of the next five days against the forecast; see the best time on this page.
Is Lake Mercer Dam indoors or outdoors?
Outdoors: best on a dry day.
Is Lake Mercer Dam good for kids?
Yes, it welcomes children.
How much does Lake Mercer Dam cost?
It's free to visit.
Do you need to book Lake Mercer Dam?
No, you can walk in.
More questions (2)Fewer questions
How long do you need at Lake Mercer Dam?
About 60 minutes.
Where is Lake Mercer Dam?
9500 Silverbrook Rd, Fairfax Station, VA 22039.
Status, rating and hours checked on 4 November 2026; kids, cost, booking and setting verified by the Wedar team. Where our data comes from
Right now · 11:45 am
Why it fits right now
A great call right now.
This is its best hour in the next five days.
In its favour
- Sun's out
- Best in the morning
- Outdoors
61°
Mostly clear
- Feels
- 53°
- Rain
- 0%
- Wind
- 14mph
- 12pm
62° - 1pm62°
- 2pm63°
The next five days
Best time to go
When your plans and the weather actually get along. Scored on the forecast, its opening hours and when it's at its best. Tap a time to see it.
Before you go
Plan your visit
Hours
Open nowmondayOpen 24 hours
All hoursFewer hours
- mondayToday
- Open 24 hours
- tuesday
- Open 24 hours
- wednesday
- Open 24 hours
- thursday
- Open 24 hours
- friday
- Open 24 hours
- saturday
- Open 24 hours
- sunday
- Open 24 hours
Hours checked 4 Nov
Where and how
Good to know
- Outdoors
- Free to visit
- Walk-ins welcome
- Allow about 60 min
- A walk
From visitors and the venue
What it's like
4.7from 81 reviews
Known for
- Paved trail
- Biking
- Owls
What people say
- People like:
- Paved trail good for walking and biking; beautiful, with owls
For the next three hours
What to wear to go there now
Leave with a jacket. Sunglasses all day.
JacketThe whole time
SunglassesThe whole time