| Mountain Skies Observatory | |
| Organization: | privately owned |
| Location: | Lyman, Wyoming |
| Coords: | 41.328°N -110.292°W |
| Altitude: | 69000NaN0 |
| Website: | https://web.archive.org/web/19991009162201/http://www.geocities.com/CapeCanaveral/Launchpad/1528/ |
| Telescope1 Name: | unnamed |
| Telescope1 Type: | Classical Cassegrain Telescope 20-inch f/11.5 |
Mountain Skies Observatory is a privately owned astronomical observatory located in Lyman, Wyoming, USA. It is one of the largest observatories in the region and is used frequently by the Bridger Valley Astronomical Society.