Check out all the great stuff we've added to the store!

Millbrook Quarry

Location: Haymaket, VA

Dive Type: Quarry


Millbrook Quarry is Under New Management!
We Appreciate your patience while we are making changes/improvements to the information below, and
Lake Millbrook.

Lake Millbrook is located about 3 miles from the Rt55 and Rt15 intersection in Haymarket, Virginia. It is about 15 minutes from Manassas and Coral Edge Adventures, and about an hour from Winchester. Lake Millbrook is operated by Coral Edge Adventures in Catharpin, VA, and is NOW OPEN from April to November with winter dives done 2 weekends per month in the off-season. It is only open to divers and their guests.

The quarry is surrounded by three entrance areas or "beaches". Each "beach" has multiple training platforms situated at 30 feet. These platforms are suspended by four large surface buoys. Aside from the platforms, there are several sunken attractions as well. At 70 feet rests an airplane, at 80 feet rests a Winnebago, and there are also several sunken boats. The rocky drop-off makes for a cool wall to look at rock formations.

The "beaches" are being renamed as follows:
Beach 1 is now Sunset Breach
Beach 21/2 is now Adventure Wall

For a map of all underwater attractions, click here.

Tank Rentals and Weight Rentals will be available starting April 30, 2016
Tanks Rentals are $8.00 for AL80/air, and $11.00 for AL80/Nitrox
Weight Rental is 25 cents/pound

The quarry is open only on the weekends from 8 am until 5 pm Saturdays and 8 am till 5 pm on Sundays during the normal season (April-November). Winter dive, weekends can be found on the CEA calendar ( No instruction/training is allowed during the winter season unless PRE-approved by CEA). It reopens on selected Saturday nights for departing night divers from 9:30 to 10:30 pm. You must fill out a one-day pass/waiver form and present your C-card at the gate. Camping is available on per-determined nights for $10.00 a night after Memorial Day and ends on Labor Day.
 Other facilities include Porta-Johns, Picnic tables, Gear Tables (coming soon),  and changing rooms.

Lake Millbrook Rules and Regulations:

  • All persons entering Lake Millbrook Must complete and sign a waiver.
  • ALL instructors must be pre-approved by CEA and hold a valid instructor pass issued by CEA prior to teaching in Lake Millbrook.
  • All Divers must present proof of certification from a nationally recognized training agency. The only exceptions are those participating in diving classes under the direct supervision of a CEA approved( see Millbrook instructor pass applications) and certified instructor.
  • Solo diving is permitted only after approval by CEA staff instructors and only when following CEA guidelines for solo diving in Lake Millbrook.
  • No artifacts, property, or underwater structures may be chipped, damaged, marked, or removed from the site. (touched or moved in any way)
  • No shoreline entries are permitted anywhere except the path and entry point at Sunset Beach.
  • Use of any underwater propulsion vehicle must be prearranged and approved.
  • No spear guns or other weapons are allowed. (no exceptions)
  • All persons must observe posted speed limits at all times. (5 MPH)
  • Parking in designated areas only.
  • All Free-Diving Activities must be pre-approved.
  • All CCR activities must be pre-approved.
  • All persons must use approved water entry and exit points only.
  • Do not interact with wildlife (in water or out of water) in any way.
  • Obey all posted ‘No Go’ zones, and those indicated on the map, as these are protected sites.
  • No feeding the fish, birds, etc.
  • All Divers must be out of the water one (1) hour prior to closing.
  • Campfires are only permitted in designated fire pits and are only for camp nights unless pre-approval is obtained.
  • No Motorboats or sailboats allowed.
  • No Fishing at any time.
  • Picnic tables are on a first-come, first-serve basis.
  • No alcohol or illegal drugs permitted on site.
  • All children must be accompanied by a parent or guardian.


Office Phone: 703-753-1127

Associated Costs: Admission passes:

$25.00 per person per day  and can be purchased on our Website at
Season Passes are available at a cost of $175.00  (Season Pass Application)
Please contact Coral Edge Adventures for Instructor/Divemaster pass Applications at

See the CEA calendar

Depth: 93'


  • 68° F surface
  • 40°'s at depth


  • The first 50' is  10' - 30'
  • Below 30' it ranges 15'-30'

Diving Hours:

  Hours: Last Dive by:
Saturday 8:00 AM to 5:00 PM 3:30 PM
Sunday 8:00 AM to 4:00 PM 2:30 PM