Rain cuts through limestone
Wied il-Qlejgħa formed as runoff eroded the landscape, creating a seasonal watercourse within a much larger valley system.
Malta · Parks & Reserves
Chadwick Lakes
A seasonal freshwater valley where rain, limestone and more than a century of water engineering come together.
Malta with running water
Chadwick Lakes is at its best when the valley is doing exactly what it was shaped to do - catching, slowing and storing winter rain.
Known locally as Wied il-Qlejgħa, this green valley between Rabat and Mtarfa contains a chain of dams, pools and channels that hold back seasonal runoff. The result is one of Malta's most distinctive freshwater landscapes.
The name comes from Sir Osbert Chadwick, whose late nineteenth-century waterworks improved the valley's rainwater storage. Today the historic system sits inside a restored ecological corridor with a roughly 2 km walking trail.
Park profile
- Type
- Seasonal freshwater valley
- Trail
- About 2 km
- Character
- Dams, pools & riparian vegetation
- Water storage
- About 70 million litres after rehabilitation
- Access
- Public & free
- Best for
- Walking, families & winter scenery
A valley engineered around water
How Chadwick Lakes took shape
The valley is natural, but much of the landscape visitors recognise today is the result of deliberate water capture and management.
Water becomes strategic
Springs and underground cisterns in the wider area were incorporated into systems supplying the Wignacourt Aqueduct and Valletta.
Sir Osbert Chadwick intervenes
A series of dams of different sizes was planned to retain more rainwater, giving the valley the name used today.
The supply network expands
The Fiddien Box and associated channels and pipes helped supplement the growing water needs of the Harbour area.
The valley is regenerated
Restoration removed debris and invasive species, repaired historic structures, improved storage and created a public nature trail.
The name
Chadwick Lakes is the popular name. The valley itself is Wied il-Qlejgħa, and the 'lakes' are really a chain of seasonal pools and reservoirs retained behind dams rather than natural permanent lakes.
The valley
Reading Chadwick Lakes as a water system
The landscape makes most sense when you follow the water from one retained pool to the next.
The bigger picture
A cascade rather than a single lake
Rainwater moves down Wied il-Qlejgħa through channels, shallow pools and successive dams. Each barrier slows the flow, stores water and prolongs its availability in the valley.
The restored system now retains around 70 million litres across the wider site, supporting agriculture while creating longer-lived wet habitat after rain.
Chadwick Lakes map. Tap to open full-screen.
Slowing the runoff
The stepped barriers interrupt the valley flow, creating the linked pools that define Chadwick Lakes.
A seasonal freshwater corridor
After rain, water moves through the valley floor and gathers in depressions, pools and channels.
Vegetation follows the water
Riparian trees, reeds and damp-loving plants contrast sharply with Malta's drier surrounding countryside.
Things to look out for
The valley changes dramatically with rainfall, so the details you notice will depend heavily on the season.
Why it matters
Water, wildlife and working countryside
Chadwick Lakes is important because the same water system serves ecology, agriculture and public recreation.
A rare wet corridor under pressure
Seasonal pools and channels support Painted Frogs, aquatic insects, riparian plants and other freshwater life.
But invasive Red Swamp Crayfish now dominate much of the water system, preying on tadpoles and other local fauna. Controlling them has become an important part of the valley's ecological rehabilitation.
A historic system still doing a job
Retaining runoff reduces water loss and keeps water available longer in the valley.
The stored water remains useful to nearby farmers, so Chadwick Lakes is not simply a scenic park but part of a functioning rural water network.
After rain
Fast-flowing water is part of the attraction, but it also changes the risk. Avoid entering channels or crossing flooded sections after heavy rainfall, and expect slippery rock and mud.
Visit planner
A simple walk through Chadwick Lakes
For a first visit, the official trail from the Fiddien side gives the clearest introduction to the valley's waterworks and ecology.
Choose a stage
Start with the water story
The old pumping station is a useful historical anchor for the walk.
- Begin near the official trail entrance.
- Notice the relationship between the built water infrastructure and the valley below.
- Read any interpretation panels before heading into the trail.
The official site gives Fiddien Box coordinates as 35.886379, 14.380477.
Watch how the water steps downhill
This is where the name 'lakes' begins to make visual sense.
- Follow the path beside the retained pools.
- Look for overflow points between successive dams.
- After rain, listen for small cascades before you see them.
Do not climb onto wet dam walls or enter fast-flowing channels.
Slow down through the greenest stretch
The restored trail runs through one of Malta's most unusual riparian landscapes.
- Look for differences between shaded wet banks and the drier slopes above.
- Watch quietly around pools for frogs, insects and birdlife.
- Notice old retaining walls and agricultural access paths.
Finish where the scale opens up
Larger basins show just how much water the catchment can hold.
- Pause at the wider basins for a final view down the valley.
- Remember that water levels can change dramatically between visits.
- Return along the trail unless you have arranged a point-to-point route.
Gallery
Along the valley
Water, dams, bridges, vegetation and the trail through Wied il-Qlejgħa.
Personal notes
My Experience
Coming here after rainfall, especially when the sun is shining, is always a wonderful experience. The water transforms the valley, everything feels greener, and the pools and small cascades make Chadwick Lakes feel completely different from Malta's usual dry landscape.
The exception is when I decide to do the trail by bike. Between the bushes, mud and awkward narrow stretches, getting through can be an absolute nightmare. It is definitely one of those routes I enjoy far more on foot.
Further reading & official information
The official Chadwick Lakes site covers the trail and places of interest, while the Energy & Water Agency explains the regeneration and water-management work.