Stakkholtsgjá

Stakkholtsgja cuts through the landscape near Þórsmörk Nature Reserve as a striking slot canyon approximately 2 kilometers long and up to 100 meters deep. The canyon's tall palagonite cliffs, draped in brilliant green moss and carved into fascinating formations over thousands of years, create an atmosphere that visitors consistently describe as fairytale-like. This hidden gem within the already remote Þórsmörk region offers one of Iceland's most rewarding short hikes, leading adventurers through an enchanting landscape to a secluded waterfall at the canyon's end.

The canyon begins relatively wide at its entrance, flanked by high, straight palagonite cliffs that tower overhead. These volcanic rock walls display the layered structure typical of palagonite formations, created when hot lava met water or ice during eruption, fragmenting and then consolidating into the distinctive yellowish-brown rock. Over millennia, moss has colonized these cliffs, transforming them into vertical gardens of green that contrast dramatically with the dark canyon floor.

Stakkholtsgja's formation tells a story of Iceland's glacial and volcanic history. The canyon was carved primarily through glacier erosion during the Ice Age, when massive ice sheets moved across southern Iceland. These glaciers, thousands of meters thick and carrying enormous grinding power, carved channels into the underlying volcanic rock. As the glaciers advanced and retreated over thousands of years, they deepened and widened these channels, creating the canyon's basic structure.

When the glaciers eventually melted at the end of the Ice Age, rushing meltwater took over the erosive work. The powerful flows continued to shape the canyon, smoothing some surfaces while creating the narrow passages and deep pools visible today. A small creek still runs through the canyon on a bed of pebbles, representing a much diminished version of the torrents that once raged through this gorge. This creek, fed by precipitation and snowmelt from the surrounding highlands, continues the slow work of erosion that has shaped Stakkholtsgja for millennia.

The canyon walls reveal the layers of volcanic eruptions that built up the landscape over time. Different colors and textures in the rock represent distinct eruptive events, each adding material that would later be carved away by ice and water. The palagonite formations, with their caves, shelves, and narrow ravines, demonstrate how water exploits weaknesses in rock, gradually widening cracks and creating the complex architecture visible today.

The hike through Stakkholtsgja typically takes 1.5 to 2 hours round trip, covering approximately 3 kilometers out and back. The trail begins at the canyon entrance off F249 road, where hikers immediately enter a world enclosed by towering cliffs. The path is relatively flat and accessible to families with children, though the uneven terrain and stream crossings require attention and care.

As hikers progress deeper into the canyon, they must cross several small streams that flow across the trail. These crossings, while not deep, feature slippery rocks that demand careful foot placement. The water is cold, fed by glacial melt and precipitation from the highlands, and proper waterproof boots with good grip are essential for safe passage. Some hikers choose to hop from rock to rock, while others simply wade through the shallow water, accepting wet feet as part of the experience.

The canyon gradually narrows as hikers advance, with the walls closing in and the sense of enclosure becoming more pronounced. Light filters down from above, creating shifting patterns of shadow and illumination on the moss-covered walls. During summer, thousands of birds nest in the canyon, their calls echoing off the rock faces and adding an auditory dimension to the visual spectacle. The atmosphere becomes increasingly mystical and otherworldly, making it easy to understand why visitors imagine elves and other hidden beings inhabiting such places.

At the canyon's end, the gorge transforms into a tall, narrow chamber where a stunning waterfall cascades down the dark rock face. The canyon walls create a natural amphitheater around the falls, with the enclosed space amplifying the roar of falling water into a thunderous symphony. Mist hangs in the air, and spray drenches anyone who ventures close, but the setting is so spectacular that most visitors willingly accept a soaking.

The waterfall drops from high above, falling through an opening in the canyon roof where sunlight occasionally breaks through, creating beams of light that illuminate the mist and falling water. This interplay of light and water, particularly when sun penetrates the narrow slot above, creates scenes of remarkable beauty. The moss-covered walls, wet from the constant spray, glow brilliant green, while the water appears silvery white against the dark volcanic rock.

The chamber containing the waterfall feels like stepping into a hidden world or a secret room that the canyon decided to reveal. The enclosed nature of the space, the deafening sound of water, and the play of light through mist create an immersive sensory experience unlike most waterfall visits. Photographers find the location challenging due to the spray that coats camera lenses, but also rewarding when they capture the unique qualities of light and water in this enclosed space.

Stakkholtsgja's dramatic beauty caught the attention of location scouts for the television series Game of Thrones, and the canyon appeared in Season 7 as the backdrop for scenes set north of the Wall. The naturally dramatic appearance of the moss-covered cliffs, narrow passages, and hidden waterfall required no special effects to create an atmosphere of otherworldly mystery.

Even visitors unfamiliar with the show immediately recognize the canyon's cinematic quality. The landscape genuinely looks like something from fantasy literature or film, with its towering walls, verdant moss, and secretive atmosphere. Children particularly enjoy the canyon, as its features fuel imaginations about elves, trolls, and other creatures from Icelandic folklore. Parents often find that the relatively easy hike and magical surroundings make Stakkholtsgja an excellent family adventure.

Stakkholtsgja sits just inside the entrance to Þórsmörk valley on F249 road, making it one of the more accessible features in this remote region. Hikers arriving via highland bus can request a stop near the canyon entrance, while those driving 4x4 vehicles can park at a small area near the trailhead. This positioning means the canyon can be visited as a short excursion during a day trip to Þórsmörk or as an easy addition to longer stays in the valley.

Despite its relative accessibility within Þórsmörk, the canyon maintains a sense of being hidden and undiscovered. The narrow entrance and the way the canyon walls conceal the waterfall until hikers are deep inside create an element of surprise and discovery. Visitor numbers remain manageable compared to Iceland's roadside attractions, preserving the quiet, peaceful atmosphere that makes the canyon so special.

The canyon is accessible only during summer, typically from late May through August, when F249 road is open and river crossings are manageable. Outside this window, winter conditions make the area completely inaccessible except to those with specialized vehicles and extensive experience in highland winter travel.