Legend
Lake Serpent
Home to the Lagarfljótsormurinn, first documented in 1345.
Lagarfljót - Iceland's Legendary Lake Serpent Home
A long, narrow glacial lake in East Iceland stretching 25 km near the town of Egilsstaðir. Famous for the legendary Lagarfljótsormurinn lake serpent and bordered by Iceland's largest forest.
Updated February 1, 2026By the Iceland.org Travel Team
Location
East Iceland
25 km long · Max depth 112 m · Near Egilsstaðir
Lagarfljót is a glacial lake fed by meltwater from Vatnajökull, giving it a distinctive murky blue-green color. The lake has been a central feature of East Iceland for centuries, both as a vital waterway and as the home of one of Iceland's most enduring legends: the Lagarfljótsormurinn, a serpent-like creature first described in medieval manuscripts. The surrounding landscape offers some of Iceland's most unexpected scenery, including Hallormsstaðaskógur, the country's largest forest, and the spectacular Hengifoss waterfall with its distinctive red clay stripes.
Safety + sourcing
Last updated: 2026-02-01
This guide is for trip planning, not emergency guidance. Conditions in Iceland can change quickly—always check official alerts and road conditions before you drive or hike.
Sources to check
Nature
Largest Forest
Hallormsstaðaskógur on the eastern shore is Iceland's largest national forest.
Access
Year-Round
On Route 1 at Egilsstaðir, East Iceland's main town with airport.
What to Expect
Hallormsstaðaskógur Forest
Iceland's largest national forest covers the eastern shore with birch, larch, and spruce. Walking trails, camping, and picnic areas make it a rare woodland experience in Iceland.
Hengifoss Waterfall
Iceland's third-tallest waterfall at 128 meters, with dramatic red clay stripes in the surrounding basalt cliffs. A 2.5 km uphill hike from the road.
Lagarfljótsormurinn Legend
Keep an eye on the murky waters for the legendary lake serpent. Information boards around the lake share the centuries-old folklore and reported sightings.
Skriðuklaustur Cultural Center
A restored medieval monastery site and museum dedicated to author Gunnar Gunnarsson, set on the lake's western shore with a cafe serving traditional food.
Litlanesfoss Waterfall
En route to Hengifoss, pass this stunning waterfall surrounded by perfectly hexagonal basalt columns, one of Iceland's finest geological displays.
Lake Loop Drive
Drive the full circuit around the lake on Routes 1 and 931, passing through forest, farmland, and waterfall viewpoints along a scenic 70 km route.
Getting There
Lagarfljót is located at Egilsstaðir in East Iceland, about 660 km from Reykjavik via Route 1 (the Ring Road). The drive takes approximately 8 hours, making it best suited as part of a multi-day Ring Road trip. Egilsstaðir has a domestic airport with regular flights from Reykjavik (about 1 hour), making the area surprisingly accessible. The town provides all services including accommodation, restaurants, fuel, and a supermarket. The lake is visible from the town center.
Best Time to Visit
Summer (June to August) is the ideal time to visit Lagarfljót, with the warmest weather, full daylight, and all hiking trails and forest paths accessible. The Hengifoss trail is best in dry conditions. Autumn (September to October) brings spectacular fall colors to Hallormsstaðaskógur, making it one of the few places in Iceland to see true autumn foliage. Winter offers northern lights and a quiet atmosphere, though some trails may be snow-covered. The lake and main roads are accessible year-round.
Planning help
Lagarfljót FAQs
Quick answers with safety notes where it matters.