Lava Field
Aðaldalshraun
Lava from the Lake Mývatn area
Adaldalur (Aðaldalur): Main Valley of Northeast Iceland
Aðaldalur
A broad lowland at Skjálfandaflói, with birch scrub on lava that came from the Mývatn area. Grenjaðarstaður gives the landscape a human scale: nearby lava was used in its house walls.
Region
Northeast Iceland
Best time: June to September
Quick Answer
Aðaldalur links the Mývatn lava landscape with the lowlands south of Húsavík. Visit Grenjaðarstaður for a close look at how local lava became building material.
Aðaldalur connects the Mývatn area with the coastal lowlands. Laxá flows through Laxárdalur and Aðaldalur, while farms and birch scrub edge the lava. A museum stop at Grenjaðarstaður helps explain how people used this rocky landscape rather than simply passing through it.
Sources and page update
Updated: 2026-09-10
Check road conditions and the opening hours of individual attractions before travelling.
For sourcing standards and how to report an error, see the editorial policy.
Vegetation
Unusually Dense
Birch scrub among lava formations
Skjálfandafljót
Western Border
One of Iceland's most powerful glacial rivers
Best Season
Jun–Sep
Summer for lush vegetation and easy access
Birdlife
Waders & Geese
Wetlands attract pink-footed geese, snipe, and other migratory birds in summer
Nearby
Húsavík & Mývatn
Good base for whale watching in Húsavík and the geothermal sites at Mývatn
Key Highlights
Aðaldalshraun Lava Field
Lava formations and birch scrub along the valley floor
Grenjaðarstaður
A turf-house museum whose walls use locally available lava rock
Heather & Birch Woodland
Lush heather moors and birch groves across the lava terrain
Skjálfandafljót River
Powerful glacial river forming the valley's western boundary
Mývatn Connection
Part of the broader Mývatn-Húsavík geological region
Ring Road Access
Plan a named stop between the Húsavík and Mývatn areas
How to Get There
- Grenjaðarstaður is about 30 km south of Húsavík
- Approximately 50 km east of Akureyri via the Ring Road, about 40 minutes by car
- Akureyri Airport is the closest domestic flight hub with daily connections from Reykjavik
- Húsavík is 20 minutes north and Mývatn is 30 minutes east, so combined day trips are easy
- Check the current road conditions for the exact destination you choose
Best Time to Visit
- June-August: Lush vegetation at peak, midnight sun, comfortable 10-15°C; the easiest months to explore the lava field
- May: Spring arrival of migratory birds including pink-footed geese in the wetlands
- September: Autumn colors in the birch and heather, northern lights season begins
- October-April: Accessible year-round via Route 1, but short daylight and cold (-5 to 3°C)
- Late June to mid-July: Best for wildflower displays across the lava field vegetation
Plan the Grenjaðarstaður stop
The museum operator dates the oldest part of the surviving house to 1865. It was occupied until 1949 and opened as a folk museum in 1958. Lava-rock insulation and driftwood paneling make this a useful place to see how locally available materials shaped the house.
Checked September 10, 2026: the operator’s Icelandic page lists June 1–August 15, daily 11:00–17:00, and winter closure, with group visits outside opening hours by agreement. The ordinary summer season has ended. Uneven floors and steep stairs limit access inside; check your needs before making a special journey.
Planning help
Adaldalur FAQs
Quick answers with safety notes where it matters.
What does Aðaldalur mean?
'Aðaldalur' translates to 'Main Valley' in Icelandic. It earned this name because it is the primary lowland valley in the region between the Skjálfandafljót river to the west and Hvammsheiði moor to the east.
Where did the Aðaldalshraun lava come from?
Visit Mývatn traces the lava to the Lake Mývatn area. Birch scrub and lava formations characterize the valley; farms lie along the lava’s margins.
What can I see at Grenjaðarstaður?
Grenjaðarstaður is a former vicarage and turf-house museum with lava-rock walls and driftwood paneling. The operator describes uneven floors and steep stairs, so some rooms are inaccessible to visitors with limited mobility.
How is Aðaldalur connected to the Mývatn area?
Aðaldalur lies to the north of Lake Mývatn, connected via the Laxá river system and Route 1. The valley is part of the broader Northeast Iceland volcanic and geological region that includes Mývatn, Krafla, and the surrounding lava landscapes.
How do I get to Aðaldalur?
Choose a named destination in the valley rather than a general valley map pin. Grenjaðarstaður is about 30 km south of Húsavík, according to the museum operator. Check the museum’s opening season as part of your route plan.
Country reference: Iceland statistics.