Walk 172 – Loch Thom Circular – 5.4 miles

At approx 1.5 miles in length and sitting at 639 ft (195m) above sea level, Loch Thom has provided a water supply to the town of Greenock since 1827. Situated in the Clyde Muirshiel Regional Park, this circular walk let’s you see the loch from every angle. You will pass several ruined farmsteads along the way, one of which was used in the filming of the ‘Shetland’ TV series. Mostly on surfaced roads with the exception of one short section on a grassy, and sometimes boggy footpath. 

Loch Thom

Viewranger logo - new - Aug 17 Click HERE to download a map of the route (Viewranger app required)

parking available icon  Extensive car parking at Greenock Cut Visitor Centre (PA16 9LX)

route image  Route: From the Greenock Cut Visitor Centre head NE to pass the cafe and follow the road alongside the Compensation Reservoir then uphill to the head of Loch Thom. Just when the road starts to leave the loch behind, look out for a gravel footpath on your right (signposted Old Largs Road) which heads downhill to the lochside. After passing through a gate you will emerge onto a minor road, briefly heading away from Loch Thom to meet up with Old Largs Road. Turn right and follow this road all the way down the eastern side of the loch. Shortly after passing the ruins of Garvock Farm (NB this was used as a film set in the TV series ‘Shetland’!) turn right to cross the bridge and continue along the road to reach the Visitor Centre. 

The ruined farmstead Killochend with Loch Thom in the background. Until the construction of the dam, the loch was called Shaws Water.  It became known as the Great Reservoir until being re-named Loch Thom after engineer Robert Thom who designed the reservoir and aqueduct scheme now known as the Greenock Cut (which is a great walk, by the way!)
Looking back: the Compensation Reservoir (farthest away) controlled the flow of water from Loch Thom into the aqueduct.


It turned out to be pretty easy going, with most of the walk being on paved surfaces. We made a short de-tour to search for a WWII bomb crater, visible on satellite images of the area.  This involved leaving the safety and security of our road to head uphill over soggy moorland and across a fence! Despite the de-tour being optional, everyone in the group got involved. With use of GPS we found it in no time and wow, was it big! There were some kids in the group who were making me nervous being so close to the edge of the waterlogged bottomless pit. The centre of it was still frozen as a result of the recent ‘Beast From the East’ but around the edges, although appearing stable enough, was saturated moss which my feet immediately sank right into. I’d love to see what it looks like empty! Although at the same time I dread to think what lies beneath the water, especially considering the sheep carcass we found shortly after!

WWII bomb crater, thought to have been created during the ‘Greenock Blitz‘ which took place over 2 nights in May 1941
Last bit of snow holding on since ‘The Best From The East’ left us earlier in the month
Cornalees Farm – from which the Greenock Cut Visitor Centre took it’s former name ‘Cornalees Bridge Visitor Centre’. Some people still call it as such, causing much confusion for the likes of me!

Despite being Scotland’s largest Regional Park, Clyde Muirshiel is little-known and underrated in my opinion. With endless walking opportunities on offer, I am glad that the Rangers are trying to promote the area through these monthly events. Be sure to check when the next led walks are and sign up, they are free of charge and I have always found Ranger Mike to be extremely knowledgeable about the area, passionate about what he does and eager to share this with everyone who will listen 🙂



5 thoughts on “Walk 172 – Loch Thom Circular – 5.4 miles

What did you think about this post?

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s