Canonical URL: https://www.iceland.org/rivers/krossa Content updated: 2026-09-10 This is the Markdown representation of the page. Interactive tools and forms are available on the [HTML page](). Source-check and review dates retain the meanings stated in the article. --- # Krossa (Krossá): The River Crossing to Þórsmörk A powerful glacial river from Mýrdalsjökull glacier, and the ford that stands between vehicles and the Þórsmörk valley. Updated September 10, 2026 · [Published by Iceland.org]() · [Writing & review]() Region South Iceland Dangerous crossings. Use highland buses or super jeeps. ## Quick Answer Krossá is among the most difficult of Iceland's glacial rivers, and it is the natural barrier to the Þórsmörk valley. Fed by meltwater from Mýrdalsjökull glacier, its flow can change within hours as temperatures rise. The river must be forded by vehicle to reach Þórsmörk, a crossing with a reputation as one of the most dangerous in Iceland. It requires specially modified vehicles. Sources and page update Updated: 2026-09-10 Never attempt to ford Krossá in a regular vehicle. Use scheduled highland buses or experienced super jeep operators. River conditions change rapidly, so check SafeTravel alerts before traveling. For sourcing standards and how to report an error, see the editorial policy. Official sources to check - [Weather (IMO)]() - [Road status (road.is)]() - [SafeTravel alerts]() - [Environment Agency of Iceland]() Best for Þórsmörk access The crossing controls vehicle access to the Þórsmörk valley. Source Mýrdalsjökull Glacial meltwater with heavy sediment and variable flow. Warning Do not ford alone Only modified super jeeps and highland buses should attempt crossings. ## What to Expect at Krossá - Fast-flowing glacial water with poor visibility of the riverbed - Multiple braided channels that shift position regularly - Mountains rising on both sides of the river valley - Water levels that can surge without warning due to glacial melt - Views of the Mýrdalsjökull ice cap from the river banks - Constantly shifting braided channels that change course with every glacial surge ## Nearby Attractions - [Þórsmörk nature reserve]() - Fimmvörðuháls hiking trail - Eyjafjallajökull glacier viewpoints - [Seljalandsfoss waterfall]() (walk behind the falls) - Laugavegur trail connecting to Landmannalaugar ## How to Get to Krossá - Located at the entrance to Þórsmörk, about 2.5 hours from Reykjavik - Highland buses run from Reykjavik during summer months - Super jeep tours available from South Iceland towns - Hiking alternatives: Fimmvörðuháls trail from Skógafoss - F-road access only; regular vehicles cannot reach the area ## Best Time to Visit Krossá - Summer (June–September): Only time highland buses operate - Morning crossings often have lower water levels - River flow peaks in afternoon from glacial melt - Early summer may still have high snowmelt levels - The area is inaccessible in winter ## The hut name changes the crossing plan [Volcano Huts’ own directions]() warn self-driving visitors not to cross Krossá. Its Húsadalur accommodation is different from Básar and Langidalur, so confirm the actual destination before choosing a bus stop, parking place or walking route. The operator describes seasonal footbridges between Básar and Langidalur, but says they can move or be removed during floods. A line on an old walking map does not confirm that a bridge is in place. Ask the hut or transport operator for that day’s approach; do not substitute a ford when the bridge is absent. Planning help ## Krossá River FAQs Quick answers with safety notes where it matters. **Can I ford the Krossá river myself?** Fording Krossá is extremely dangerous and should only be attempted by experienced drivers in modified super jeeps. The river's glacial flow changes rapidly, and the riverbed shifts constantly. Use a suitable bus or professional transfer and confirm which hut it serves. **Why is Krossá considered dangerous?** Krossá is fed by Mýrdalsjökull glacier meltwater, which can surge without warning due to temperature changes or geothermal activity. The cold, silty water obscures the rocky bottom, and strong currents can sweep vehicles off course. **How do I get to Þórsmörk without crossing Krossá?** You can hike into Þórsmörk via the Fimmvörðuháls trail from Skógafoss or the Laugavegur trail from Landmannalaugar. Scheduled highland buses with river-crossing capability also run from Reykjavik and Hella during summer. **Where does Krossá originate?** Krossá originates from the Mýrdalsjökull glacier, specifically from outlet glaciers on the northern side. The river carries heavy glacial sediment, giving it a characteristic grey-brown color. **When is the safest time to visit the Krossá area?** Summer (June–August) offers the most accessible conditions, but the river is never truly 'safe' for casual crossings. Time of day does not establish a safe crossing. Always check conditions with local guides. [All rivers]() Country reference: [Iceland statistics]().