Iceland
Canyons of Iceland: From Fjaðrárgljúfur to Stuðlagil
Iceland doesn't lack for waterfalls, but its canyons are where the geology does the most talking — river-cut gorges up to 100 metres deep, a rift you can walk straight through, and one basalt-column slot that stayed hidden underwater until a dam changed the river beneath it. We picked ten that earn a detour, loosely ordered from the easiest add-on to a Ring Road day toward the ones that ask for a highland F-road and a spare afternoon, with a couple of standalone stops slotted in by geography rather than strict difficulty. For each: how to actually reach the view that makes it famous (not just the parking lot), when the light or the water colour is worth timing around, and what closes, floods, or now needs a permit.
Rauðfeldsgjá, the peninsula entry on this list, works better as a quick add-on to a longer day than as a destination in itself — it slots into day one of our 2-day Snæfellsnes itinerary, alongside the craters and beaches nearby.
South Iceland · IcelandFjadrargljufur Canyon
HikingCanyonViewpointIceland's poster-child canyon, carved by the Fjaðrá river into a two-kilometre serpentine gash up to 100 metres deep, with sheer green-mossed walls that curve back on themselves at almost every viewpoint. A short walk from the paved parking (roughly 800 metres each way) follows a boardwalk and rope-lined path to the main overlook; the trail continues further along the rim for those who want the classic look-down-the-throat shot. After a 2015 music video sent visitor numbers soaring and trampled paths began eroding the moss, the Environment Agency closed the canyon from March to June 2019 to let it recover — it reopened with the current duckboards and now sees only short spring closures rather than long ones. It's a protected nature reserve, so a drone here needs a permit, not a spontaneous launch. Go on an overcast day: flat light softens the green and avoids the harsh shadows a sunny midday throws across the gorge.
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Northeast Iceland · IcelandAsbyrgi Canyon
HikingCanyonA horseshoe-shaped gash in the northern lava plain, 3.5 km long and over a kilometre wide, with cliffs up to 100 metres high wrapping around a forested valley floor — a rare patch of birch woodland in this part of Iceland. Geologists trace the shape to catastrophic glacial-flood outbursts (jökulhlaups) from Vatnajökull thousands of years ago; in Norse folklore it's the hoofprint of Sleipnir, Óðinn's eight-legged horse. A rock pillar called Eyjan ('the Island') splits the canyon floor for over half its length, with an easy marked trail climbing to a viewpoint over the whole horseshoe. Part of Vatnajökull National Park, it's open and free year-round, reachable on foot from the visitor centre car park — no real hike required to see the main sweep of cliffs, which makes it the easiest big canyon here to fold into a Diamond Circle day.
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Northeast Iceland · IcelandDettifoss Waterfall
WaterfallCanyonDettifoss doesn't just drop into a canyon — it's the loudest chapter in one, the Jökulsárgljúfur gorge that the Jökulsá á Fjöllum river has cut through basalt over thousands of years of glacial floods. Road 862 on the west side is paved and easy, with a marked path to a front-on viewpoint; road 864 on the east is gravel, closed roughly from winter until early June, but gets you closer and square-on for photos with far less spray drifting into the lens. From the east-side car park a rough, boulder-strewn trail follows the canyon rim about 2.5 km downstream to Hafragilsfoss, a second, far less-visited waterfall dropping between the same basalt walls — worth the 1.5–2 hour round trip if you want the canyon without the crowds pooling at Dettifoss itself. Flow, and the ground shaking underfoot, peak with summer glacial melt.
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Northwest Iceland · IcelandKolugljufur Canyon
WaterfallCanyonThe easiest canyon on this list to add without planning around it: turn off Route 1 onto Route 715 for about 6 km, and it's under five minutes on foot from the car park to a bridge crossing right over the gorge. The Víðidalsá river has cut a canyon roughly a kilometre long and up to 50 metres deep, with the Kolufossar waterfalls stacked in a series below the bridge. It's named for Kola, a troll giantess said to have lived on a ledge in the canyon wall and fished salmon out of the pool below the falls by hand — a detail worth narrating to kids in the back seat. Free, open year-round, no hiking gear required.
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East Iceland · IcelandStudlagil Canyon
HikingCanyonUntil the Kárahnjúkar hydropower dam cut the Jökla river's flow roughly in half after 2009, most of Stuðlagil's basalt columns sat underwater; a local photographer only 'found' the fully exposed canyon in 2016, and it's since become one of East Iceland's most-photographed spots. The two banks give different trips: the east-side trail from Klaustursel is the long one — roughly 4–5 km each way from the free main car park before the river, or about half that if you can reach the paid upper lot across the bridge — but it's the only route that gets you down to the water's edge among the columns, which is where the classic postcard shot comes from. The west-bank path is shorter, close to 1 km, and was long a rim-only view; new stairs and platforms added in 2025 now bring it down toward river level too, so it's the better choice if you're short on time or mobility. Time it for the water: the river runs a vivid turquoise from roughly March through July, then turns silty grey from around August as the Hálslón reservoir upstream starts to overflow.
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West Iceland · IcelandRaudfeldsgja Gorge
CanyonA narrow cleft on the Snæfellsnes Peninsula that you walk straight into, following a shallow stream over rounded boulders between walls that close in fast. The first 200 metres are an easy scramble in trainers; past that the gorge narrows further and you'll want a head torch, since daylight all but disappears once the walls meet overhead — most visitors turn back around the 400-metre mark, where it becomes real scrambling. The saga behind the name is grim: after his nephew Rauðfeldur pushed Bárður's daughter out to sea on an iceberg, Bárður — a half-troll said to guard the peninsula — threw him into this gorge in revenge (the gorge is named for him); a second nephew, Sölvi, was hurled off a separate cliff near Arnarstapi the same day. Pair the gorge with that nearby fishing village and you've got a half-day loop without touching a highland road.
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South Iceland · IcelandMulagljufur Canyon
HikingCanyonNot signposted from Route 1 between Skaftafell and Höfn — watch for an unmarked gravel turn near Hnappavellir, then a 1 km track to a small pay-and-display car park (the Parka app, not cash) and a further 7–8 minute walk to the trailhead. From there it's about 3.8 km one way along the canyon rim to Hangandifoss, a slender fall dropping close to 120 metres into the gorge, with a second waterfall, Múlafoss, further along — allow 2.5–3 hours round trip. A 2WD car manages the access road in dry summer weather, but a stream crossing and rutting after rain make 4x4 the safer call. It's one of the least crowded big canyons in the South, mostly because so few visitors know the turn-off exists.
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South Iceland · IcelandSigoldugljufur Canyon
HikingViewpointCanyonWaterfallNicknamed the 'Valley of Tears' for the dozens of thin waterfalls that stripe its mossy walls after snowmelt, making the cliff look like it's weeping, this one sits in the Central Highlands off F208 toward Landmannalaugar — a 4x4-only road that typically opens mid-June and closes mid-September, so this is strictly a summer stop. Most people spend 20–45 minutes walking the rim between viewpoints rather than committing to a full hike; the reward is a canyon that still feels genuinely unvisited compared to the Ring Road classics. Combine it with a Landmannalaugar day so the F-road drive earns its keep twice over.
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East Iceland · IcelandHafrahvammagljufur Canyon
HikingCanyonAlso called Dimmugljúfur, 'the dark canyon' — and at over 200 metres deep while barely 20 metres wide in places, it's the deepest canyon in Iceland, cut through layered volcanic tuff in the eastern highlands above the Kárahnjúkar dam. There's no easy version of this one: reaching it means highland roads (F910 past the dam requires a proper 4x4) open only in summer, roughly July to mid-September. What you get for the drive is total isolation — no crowds, no boardwalks, just a slot of rock disappearing into shadow far below the rim. Go for the scale, not for a quick photo stop; this is the one canyon on this list that asks for a real highland detour.
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Reykjanes Peninsula · IcelandLambafellsgja Canyon
CanyonHikingA slot canyon on the Reykjanes Peninsula formed by the same rift that's pulling the North American and Eurasian plates apart — you're walking through the join, not just near it. Park near Keilir off Route 41 and it's about a 1 km walk over a bumpy lava track (a 4x4 helps, summer only) to the fissure, then an easy hour threading between walls of hardened lava and tuff up to 50 metres deep — doable with kids. It's the one canyon here that sits close to Keflavík Airport and Reykjavík, so it works as a first- or last-day stop rather than a detour that eats a whole day.
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Group these by region rather than chase all ten on one trip: Fjaðrárgljúfur and Múlagljúfur sit on the South Coast, Ásbyrgi, Dettifoss and Kolugljúfur cluster around the Ring Road's north loop and Diamond Circle, and Sigöldugljúfur and Hafrahvammagljúfur only open up once the F-roads do, roughly mid-June to mid-September — check road.is before committing to any highland detour. Drone rules inside Iceland's protected reserves and national parks have been tightening, with permits now required at sites like Fjaðrárgljúfur, so check current guidance rather than assume you can fly.
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