An Astronomers Dream in Your Own Backyard


Muddy Run Park, an Exelon Generation Co. LLC property, in Holtwood, PA is an astronomers dream in your own backyard. Muddy Run Observatory is a public outreach facility featuring astronomy and STEM education. Offering free monthly public events and private nights for members. Check our events page for the most up-to-date information.

Muddy Run Observatory and Educational Programming a joint-partnership between:
Rittenhouse Astronomical Society
Harford County Astronomical Society
Astronomy Enthusiasts of Lancaster County


Find out what we are all about!