Overview
Lake Marathon — locally known as Limni Marathona — is a reservoir located in the northeastern part of Attica, roughly 38 kilometres from central Athens. It was formed by the Marathon Dam, completed in 1929, which at the time of its construction was the only dam in the world built entirely of marble. The reservoir was long the primary water supply for Athens, though its role has since been supplemented by other sources.
The area sits within a quietly attractive stretch of Attic landscape: low hills covered in pine and scrub, occasional orchards, and the wide blue expanse of the lake itself. It is not a resort destination in any commercial sense, but rather a calm, largely uncommercialized corner of Attica that rewards visitors who are happy to slow down and take in the scenery.
Most visitors combine Lake Marathon with the nearby plain of Marathon — site of the famous 490 BCE battle — making a combined historical and natural excursion from Athens. The combination is well suited to a single full day.
Before You Go
Visas
Greece is a Schengen Area member state. For visa requirements specific to your nationality, check TravelerPulse's Visas section and consult the official Greek immigration authority or your nearest Greek consulate before travel.
What to bring
- Comfortable walking shoes if you plan to explore around the dam or the surrounding paths
- Sun protection; shade is limited near the lake shoreline
- Water and snacks — services directly at the lake are minimal
- A camera; the marble dam and lake views are photogenic, especially in morning light
Practical expectations
This is a quiet, semi-rural area. Do not expect tourist infrastructure comparable to Athens or even Marathon town. Facilities are sparse. Verify current access rules for the dam and reservoir area locally or with the Athens Water Supply and Sewerage Company (EYDAP), which administers the reservoir.
Getting There
From Athens by car or motorcycle
Driving is the most practical option. The route from Athens typically runs through Nea Makri or via the Marathon Avenue (Leoforos Marathonos). Journey time is roughly 45–60 minutes depending on traffic, which can be heavier on weekend mornings heading out of the city.
By public bus
Athens's regional bus network (KTEL Attikis) operates routes toward the Marathon area from the Pedion tou Areos terminal in central Athens. Services pass through or near the lake area, but schedules and stops should be verified directly with KTEL Attikis before you travel, as they are subject to change.
Organized day tours
Several Athens-based tour operators offer day trips combining Marathon battlefield, the Archaeological Museum of Marathon, and the lake area. This can be a convenient option if you prefer not to self-drive. Verify current offerings and prices locally or through reputable booking platforms.
Getting Around
The Lake Marathon area is not walkable from any major transport hub, so having your own vehicle gives the most flexibility. Once at the reservoir, the dam itself and its immediate viewpoints are accessible on foot. The surrounding countryside has limited marked trails, so independent hiking should be approached with a good map and realistic expectations about path conditions.
If you arrive by bus, the options for moving between the lake, the Marathon plain, and the archaeological museum without a car are limited. Taxis from Marathon town are an option; agree on the fare or confirm the meter before setting off.
Things to See & Do
The Marathon Dam
The dam is the centrepiece of a visit. Its marble-clad face — an unusual aesthetic choice driven by the abundance of local Pentelic marble — is genuinely striking. Views from the road above the dam look out over the reservoir and into the surrounding hills. Access to certain areas may be restricted; verify the current situation locally.
Marathon Battlefield and Tumulus (Soros)
A short drive from the lake, the burial mound (Soros) of the 192 Athenian soldiers who died at the Battle of Marathon in 490 BCE is one of the most historically significant and quietly moving sites in all of Greece. The flat plain that was the battlefield stretches around it.
Archaeological Museum of Marathon
The local archaeological museum houses finds from the broader Marathon area, including grave goods and artifacts related to the battle period and earlier prehistory. Verify opening hours and admission fees on the official Hellenic Ministry of Culture website before visiting.
Schinias National Park
Just east of the Marathon plain, Schinias is one of the few coastal wetland and pine forest parks in Attica. It offers birdwatching, walking paths, and a long sandy beach. It complements a Lake Marathon day trip well.
Quiet lakeside contemplation
For many visitors, simply sitting above the reservoir and watching the light change on the water is reason enough to come. There is no admission charge to view the lake from public roads and viewpoints.
Food & Drink
There are no restaurants or cafés directly at the lake. Marathon town, a few kilometres away, has tavernas serving standard Greek fare — grilled meats, salads, mezedes, fresh bread. The town is small, so options are limited; expect straightforward, honest Greek cooking rather than a broad dining scene.
If you are self-driving, consider packing a picnic. Greek supermarkets in Athens or the surrounding towns are well stocked with olives, cheese, bread, fruit, and charcuterie that travel well. Eating at a viewpoint above the reservoir on a clear day is one of the more pleasant simple pleasures the area offers.
Water from your own supply is advisable; the lake itself is a drinking-water reservoir and swimming or water contact is not permitted.
Practical Information
Emergency numbers
The pan-European emergency number 112 operates in Greece and connects to police, ambulance, and fire services. The Greek police number is 100 and ambulance is 166, though 112 is sufficient for most emergencies.
Connectivity
Mobile coverage (4G) from major Greek carriers is generally adequate along the main roads to Marathon and at the lake, though it may be patchy in more remote parts of the surrounding hills.
Money
There are no ATMs or banks at the lake itself. Withdraw cash in Athens or in Marathon town before heading out. Card acceptance in small local tavernas is not guaranteed; verify locally.
Toilets
Public facilities near the lake are very limited. Plan accordingly before leaving Marathon town.
Safety
Lake Marathon and the surrounding Attic countryside are generally safe and present no unusual risks for visitors. Standard travel common sense applies: keep valuables out of sight in parked cars, stay on known paths if walking in the hills, and carry adequate water and sun protection during summer months.
Summer temperatures in Attica can be high (frequently above 35 °C in July and August), and shade near the reservoir is limited. Heatstroke is a real risk; schedule outdoor activity for the morning hours and carry more water than you think you need.
The reservoir is a protected water-supply area. Respect any fencing or signage restricting access, and do not attempt to swim in or access the water.
Local Culture & Etiquette
The Marathon plain holds an outsized place in Greek historical memory and, through the word 'marathon' itself, in global culture. Locals are generally accustomed to visitors coming for historical reasons and are straightforward and welcoming without being oriented around tourism.
Greek social norms apply here as everywhere in rural Attica: a greeting ("yia sas" / γεια σας is a safe formal option) is appreciated when entering a shop or taverna. Modest dress is sensible if you visit any church in the area. Noise and disruption at the Soros and battlefield sites are out of place given their significance as war graves.
