Mýrdalsjökull is a glacier in southern Iceland, situated to the north of Vík í Mýrdal and to the east of the smaller glacier Eyjafjallajökull. At 1480 metres tall, it is the fourth largest glacier in the country, and rests on the active volcano Katla, which last had a powerful eruption in 1918. The ice inside the 10km caldera is prone to frequent eruptions and glacier bursts. Eruptions can start in many places outside or within the caldera and cause great glacier bursts, which often flow down onto the lower lying areas and discharge a great volume of water.

Tour groups operate hikes up the glacier, which provide breathtaking views of the surrounding scenery. Hiking gear is necessary for the climb. Aside from walking, guided snow, scooter, snowmobile, Super Jeep, dog sledding and ice climbing tours are all offered on the Myrdalsjökull glacier. Independent hiking and cross-country skiing is also possible on the glacier, but is recommended for the experienced only.