Can you visit George Mason Observatory? Yes
Free public tours Wed, Thu, Sat late Aug-late Apr; Evenings Under the Stars talks with telescope tours during the academic year.
A public night at an observatory usually starts at dusk with a short talk, then a line at the eyepiece of the main telescope for the Moon, a planet or a bright cluster, with volunteers' smaller telescopes set up outside. Dress for the night air even in summer: domes are not heated, so the telescope stays at outside temperature. Many nights sell out or cancel for clouds, so check the observatory's site on the day.
Telescopes at George Mason Observatory
32" RCT, 16" dob, 3 12" SCT.
How dark the sky is at George Mason Observatory
George Mason Observatory has no Bortle rating in the list yet. The scale below shows what each class looks like.
Sky brightness and class come from the World Atlas of Artificial Night Sky Brightness (Falchi et al. 2016, CC BY-NC 4.0), with natural skyglow added, at the coordinates below. Research telescopes are often sited on mountains above the haze, so the real sky can be darker than the map suggests.
George Mason Observatory among the observatories of Virginia
Green dots are observatories open to the public, blue dots research or private sites, squares dark sky places; select one for its page. See Virginia observatories for the full list.
The coordinates on this page point to zip 22030 (approximate): 38.846°N, 77.324°W.
Map data © OpenStreetMap contributors. Open the larger map · Directions. Mountain observatory roads are often gated after dark; go only on a scheduled public night.
Dark sky places, observatories and clubs near George Mason Observatory
George Mason Observatory is about 16 km (10 mi) from Observatory Park at Turner Farm Urban Night Sky Place, a Bortle Class 6 dark sky place. See Observatory Park at Turner Farm Urban Night Sky Place for camping, where to set up and the sky by season.
Nearest dark sky places
| Place | Where | Bortle | Distance |
|---|---|---|---|
| Observatory Park at Turner Farm Urban Night Sky Place | Virginia | 6 | 16 km (10 mi) |
| Sky Meadows State Park | Virginia | 4 | 57 km (35 mi) |
| Rappahannock County Park | Virginia | 4 | 73 km (46 mi) |
| Shenandoah National Park | Virginia | 3 | 103 km (64 mi) |
| Shenandoah National Park | Virginia | 3 | 103 km (64 mi) |
| George Washington and Jefferson National Forest | West Virginia | 3 | 122 km (76 mi) |
Other observatories open to the public within 150 km
- Crosby Ramsey Memorial ObservatoryBaltimore, Maryland, 76 km (47 mi). Rooftop observatory at Maryland Science Center; daytime sungazing and Friday evening stargazing events (see calendar)
- Maryland Space Grant ObservatoryBaltimore, Maryland, 82 km (51 mi). Free open houses on scheduled Friday evenings with the Morris W. Offit telescope (check observatory updates)
- Morgan County ObservatoryBerkeley Springs, West Virginia, 108 km (67 mi). Morgan County Observatory Foundation public stargazing and talks; new telescope first-light open house Mar 2026
- Keeble ObservatoryAshland, Virginia, 124 km (77 mi). Free open viewing nights during the semester (e.g. Apr 9, 2026)
- Leander McCormick ObservatoryCharlottesville, Virginia, 136 km (85 mi). Free Public Nights 1st and 3rd Friday monthly year-round (9-11 pm DST, 7-9 pm winter); free Eventbrite registration required
- Naylor ObservatoryLewisberry, Pennsylvania, 150 km (93 mi). Astronomical Society of Harrisburg public observing nights at Naylor Observatory on scheduled weekend evenings (see ASH calendar)
Astronomy clubs within 150 km
- Northern Virginia Astronomy ClubFairfax, Virginia, 0 km (0 mi). Meets Usually 2nd Sunday monthly, 7:30 pm
- National Capital AstronomersBethesda, Maryland, 22 km (14 mi). Meets Monthly Sep-Jun at University of Maryland Observatory, College Park
- Southern Maryland Astronomical SocietyMarbury, Maryland, 35 km (21 mi). Meets Observing sessions on Saturdays nearest third quarter and new moon at Nanjemoy Creek Environmental Education Center
- Astronomical Society of GreenbeltGreenbelt, Maryland, 42 km (26 mi). Meets Monthly, 7:30 pm
- Howard Astronomical LeagueColumbia, Maryland, 58 km (36 mi). Meets Monthly Thursday, 7 pm
Star parties near George Mason Observatory
| Star party | Near | Distance | Usual timing |
|---|---|---|---|
| Shenandoah Night Sky Festival | Luray, Virginia | 103 km (64 mi) | Late summer |
| Almost Heaven Star Party | Riverton, West Virginia | 192 km (119 mi) | New-moon weekend in August |
| Green Bank Star Quest | Green Bank, West Virginia | 222 km (138 mi) | Summer |
| Cherry Springs Star Party | Coudersport, Pennsylvania | 316 km (196 mi) | June, near new moon |
Planning a trip? Astrotourism in Virginia puts the dark sky places, observatories, clubs, star parties, planetariums and science centers of the state on one map, with the best night out worked out.
George Mason Observatory record
Every value in the observatories dataset for George Mason Observatory
| ID | 460 |
|---|---|
| Name | George Mason Observatory |
| Address | atop Research Hall, 10401 York River Rd |
| City | Fairfax |
| State | VA |
| Zip | 22030 |
| Country | USA |
| Web | https://sites.google.com/view/georgemasonobservatory/home |
| Public | y |
| Telescope | 32" RCT, 16" dob, 3 12" SCT |
| Lat | 38.84580 |
| Lon | -77.32420 |
| LatLonSpot | zip 22030 (approximate) |
| Status | Active |
| StatusNote | George Mason University |
| PublicNote | Free public tours Wed, Thu, Sat late Aug-late Apr; Evenings Under the Stars talks with telescope tours during the academic year |
| Sources | https://sites.google.com/view/georgemasonobservatory/visit?authuser=0 |
| ParkID | 961 |
| ParkKm | 16. |
From the site's observatories dataset (observatories_q426). Distances are computed from the coordinates.