Outer Line
A climber on an extreme mountaineering route

Ranked by difficulty + risk, across all 50 countries

The 10 most extreme things on this site

Every activity here is scored on difficulty and risk level. These ten come out on top — updated automatically as new countries and activities get added, not a fixed list.

  1. 01Argentina →
    Aconcagua summit expedition — photo 1 of 5
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    Photo: Jens Peter Olesen / Unsplash

    Mountaineering · Mendoza Province

    Aconcagua summit expedition

    INSANERisk: EXTREMEUSD Guided expedition (18–20 days) US$4,500–7,000Permit requiredGuide required
    Standard travel insurance usually won't cover this. See what actually will →

    The highest peak in the Western and Southern Hemispheres at 6,961m — the standard Normal Route is non-technical but brutally attritional, with a roughly 30% average summit success rate once altitude, weather windows and multi-week acclimatization schedules are accounted for.

    Best season: December – February-32.653, -70.011
    #highest peak Americas#high altitude#multi-week expedition#permit required
    Find a guide / operator
  2. 02Canada →
    Arctic ski expedition, Baffin Island — photo 1 of 5
    Arctic ski expedition, Baffin Island — photo 2 of 5
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    Photo: Johannes Andersson / Unsplash

    Polar Expedition · Nunavut

    Arctic ski expedition, Baffin Island

    INSANERisk: EXTREMECAD Guided expedition 8,000–15,000+Permit requiredGuide required
    Standard travel insurance usually won't cover this. See what actually will →

    Multi-week self-supported or guided ski-and-pulk traverses across fjord ice and mountain terrain inside the Arctic Circle, in temperatures that regularly fall below –30°C — this is genuine polar-expedition logistics, not a guided day trip, with satellite communication and evacuation insurance a baseline requirement.

    Best season: March – May69.500, -68.500
    #polar expedition#extreme cold#self-supported#satellite comms required
    Find a guide / operator
  3. 03Canada →
    BASE jumping & big wall climbing, Stawamus Chief — photo 1 of 5
    BASE jumping & big wall climbing, Stawamus Chief — photo 2 of 5
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    Photo: Tom Wheatley / Unsplash

    BASE Jumping · Squamish, British Columbia

    BASE jumping & big wall climbing, Stawamus Chief

    INSANERisk: EXTREMEFree
    Standard travel insurance usually won't cover this. See what actually will →

    A 700m granite monolith above Howe Sound that's both one of Canada's premier big-wall climbing objectives and a known (informal, legally grey) BASE-jump exit — climbers spend days on multi-pitch routes up the same face that jumpers descend in seconds.

    Best season: April – October49.681, -123.145
    #BASE jumping#big wall climbing#granite monolith#legally grey
    Find a guide / operator
  4. 04United States →
    BASE jumping & cliff diving, Moab — photo 1 of 5
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    Photo: Tom Gainor / Unsplash

    Extreme Jump · Moab, Utah

    BASE jumping & cliff diving, Moab

    INSANERisk: EXTREMEFree
    Standard travel insurance usually won't cover this. See what actually will →

    Utah's red-rock desert around Moab is one of the most active legal-and-grey-area BASE jumping zones in the US, with sandstone towers like Castleton and Ancient Art offering both climbing objectives and jump exits within the same formation.

    Best season: March – May, September – November38.573, -109.550
    #BASE jumping#sandstone towers#desert#legally grey
    Find a guide / operator
  5. 05France →
    BASE jumping, Aiguille du Midi — photo 1 of 5
    BASE jumping, Aiguille du Midi — photo 2 of 5
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    Photo: Lane Smith / Unsplash

    BASE Jumping · Chamonix, Haute-Savoie

    BASE jumping, Aiguille du Midi

    INSANERisk: EXTREMEFree
    Standard travel insurance usually won't cover this. See what actually will →

    One of the highest-altitude, most legendary BASE exits in the world, launched from a platform beside the Aiguille du Midi cable car station at nearly 3,800m — an activity with a real, well-documented fatality history that keeps it firmly in expert-only, invitation-network territory rather than a bookable tour.

    Best season: June – September45.878, 6.887
    #BASE jumping#high-altitude exit#expert-only#significant fatality history
    Find a guide / operator
  6. 06Norway →
    BASE jumping, Kjerag — photo 1 of 5
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    Photo: Filip Toroński / Unsplash

    BASE Jumping · Lysefjord, Rogaland

    BASE jumping, Kjerag

    INSANERisk: EXTREMEFree
    Standard travel insurance usually won't cover this. See what actually will →

    One of the world's most iconic BASE exits — a near-1,000m freefall over Lysefjorden from the same plateau tourists scramble to for photos on Kjeragbolten. A well-established jumper community and packing area exist here, but the exit has also killed a number of experienced jumpers over the years; this is not an entry-level BASE site.

    Best season: June – September59.035, 6.621
    #BASE jumping#1000m exit#experienced only#fjord
    Find a guide / operator
  7. 07Switzerland →
    BASE jumping, Lauterbrunnen Valley — photo 1 of 5
    BASE jumping, Lauterbrunnen Valley — photo 2 of 5
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    Photo: Robin Ulrich / Unsplash

    BASE Jumping · Lauterbrunnen, Bernese Oberland

    BASE jumping, Lauterbrunnen Valley

    INSANERisk: EXTREMEFreePermit required
    Standard travel insurance usually won't cover this. See what actually will →

    The closest thing the sport has to a spiritual home — a cluster of legal cliff exits ringing a single glacial valley, used by BASE jumpers worldwide for training and filming. It's also one of the deadliest corners of extreme sport tourism, with a long list of fatalities; local rules require jumpers to register exits and carry real BASE experience, not show up as novices.

    Best season: May – September46.594, 7.906
    #BASE jumping#cliff exits#experienced only#high fatality rate
    Find a guide / operator
  8. 08Faroe Islands →
    BASE jumping, sea cliff exits — photo 1 of 5
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    Photo: Lane Smith / Unsplash

    BASE Jumping · Various islands

    BASE jumping, sea cliff exits

    INSANERisk: EXTREMEFree
    Standard travel insurance usually won't cover this. See what actually will →

    A small but committed local BASE community uses the Faroes' sheer sea cliffs as exit points, jumping straight out over open ocean rather than the more common terrain-following cliff jumps found elsewhere — genuinely niche, expert-only, and arranged through personal contact rather than any commercial operator.

    Best season: May – August62.100, -7.000
    #BASE jumping#sea cliff exits#expert-only#no commercial operator
    Find a guide / operator
  9. 09Morocco →
    Big wall climbing, Taghia Gorge — photo 1 of 5
    Big wall climbing, Taghia Gorge — photo 2 of 5
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    Photo: Daniel Jiménez / Unsplash

    Rock Climbing · Central High Atlas

    Big wall climbing, Taghia Gorge

    INSANERisk: EXTREMEFree
    Standard travel insurance usually won't cover this. See what actually will →

    Sheer limestone walls up to 700m tall in one of the most remote inhabited valleys in the High Atlas, reached by mule track from the nearest road — regarded by serious climbers as one of the best big-wall limestone destinations on Earth, and still barely known outside climbing circles.

    Best season: April – June, September – October31.983, -5.750
    #limestone big wall#mule track approach#remote valley#world-class
    Find a guide / operator
  10. 10Greenland →
    Big wall climbing, Tasermiut Fjord — photo 1 of 5
    Big wall climbing, Tasermiut Fjord — photo 2 of 5
    Big wall climbing, Tasermiut Fjord — photo 3 of 5
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    Photo: Visit Greenland / Unsplash

    Rock Climbing · South Greenland

    Big wall climbing, Tasermiut Fjord

    INSANERisk: EXTREMEFree
    Standard travel insurance usually won't cover this. See what actually will →

    Granite spires rising sheer out of the fjord water, rivaling Patagonia's Torres del Paine in scale but reached by boat through iceberg-strewn water rather than by trail — expeditions here are entirely self-supported, with the nearest help days away by sea.

    Best season: July – August60.467, -44.500
    #big wall#fjord access by boat#self-supported#remote
    Find a guide / operator