A unique and magical visitor attraction under the Dark Skies of County Durham.

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Welcome to Grassholme Observatory

With truly dark skies *and picturesque views over Teesdale’s Grassholme reservoir, Northumbrian Water, alongside lead astronomer Gary Fildes, are extremely excited to bring to you a visitor experience that is out of this world!

Our purpose built observatory, based within the beautiful County Durham countryside, offers you the opportunity to gaze into the vastness and beauty of the universe. Astronomy is a humbling experience, so let us guide you to understand the wonders of planets stars galaxies and beyond.

Grassholme observatory is your one stop destination to the rest of the universe. Using high tech instruments and computers from our wonderful observatory and classroom, Gary and his team will take you on a journey that is simultaneously inspirational educational and accessible for all.

Welcoming you to your universe!

It may be that because of cloud cover you are not able to view the moon or stars through a telescope, should this be the case then your host on the event will advise you and you will be sent a discount code via email which will allow you a 20% discount on a future booking taken within 2 months of the event.


*Depending on the phase of the moon, some dimmer stars may be less visible due to the moon light. During these times more weighting towards moon observations may occur.
*All images shown on this website depicting the night sky have been taking at Grassholme Observatory or reservoir unless stated.

What’s On

At Grassholme Observatory

Useful Information

Here are some links to contact us with your queries.


Near Barnard Castle

Take the B6277 from Barnard Castle towards Mickleton. Turn off at the western end of the village, signposted Grassholme Reservoir. The main car park is roughly a mile up the road on the right.

Find us using sat nav:
DL12 0PW

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Explore Grassholme reservoir and local area

Grassholme Observatory Begins

Over the last 18 months, a dedicated team at Northumbrian Water has worked closely with our Observatory astronomer, to develop …

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