K2 Base Camp Trek — Full Itinerary, Permits & Logistics

Of every walk we run rangers on, the trek to K2 Base Camp is the one most people who’ve heard of the Karakoram come for. It’s the long approach — up the longest non-polar glacier on earth, the Baltoro — to stand at 5,150 m on the moraine below the south face of K2. Imran on our ranger team has done it five seasons running, and the answer to “is it worth it?” hasn’t changed.

What the trek is, in numbers

• Duration: 14–16 days return from Skardu (8 days in, 5 days out, plus rest days).
• Total walking distance: ~110 km on foot, plus 6–7 hours of jeep road from Skardu to the Askole trailhead.
• Maximum elevation: 5,150 m at K2 Base Camp; 5,545 m if you continue to Gondogoro La.
• Total elevation gain: roughly 3,300 vertical metres from Askole.
• Difficulty: non-technical until Concordia. After Concordia the moraine becomes loose, the air thin, and the weather brutal. Strenuous, not technical — until Gondogoro La, which is technical.
• Season: mid-June to mid-September. July and August are the safest weather window.

Day-by-day, the way we walk it

This is the route we recommend to operators bringing groups onto the Baltoro corridor. It assumes a fit, properly acclimatised group with porter support.

Days 1–2: Skardu → Askole

Skardu sits at 2,230 m. Most groups spend a day here for permits, checking in with our office on Sadpara Road, and an overnight to start sleeping high. The drive to Askole is 6–7 hours along the Braldu River road — jeep only, often closed for hours by rockfall. Askole at 3,000 m is the last village; this is where you hire porters, weigh loads, and meet the muleteer who’ll bring your gear up.

Day 3: Askole → Jhola (3,200 m, ~20 km, 7–8 hours)

The trail follows the Braldu, crosses the suspension bridge at Korofong, then climbs onto the moraine of the Biafo Glacier’s snout. Long, hot, dusty — the warmest day of the whole trek for most groups. Jhola is a flat campsite by a side stream.

Day 4: Jhola → Paju (3,420 m, ~22 km)

This is the day you actually see the mountains start. Trango Towers come into view late morning — the south-east face of Trango Nameless Tower is one of the largest sheer granite walls on earth — and Cathedral Group rises behind. Paju is the last vegetation. After here, no more trees.

Day 5: Rest day at Paju

Take it. This is when porters re-pack loads for the glacier walking ahead, and the rest day gives your body its first real chance to acclimatise above 3,000 m. Walk an hour up the moraine for a view of the Baltoro snout and you’ll understand why we insist on the rest.

Day 6: Paju → Khoburtse / Urdukas (3,940 m)

Out of the trees, onto the glacier. The Baltoro is rubble-covered ice for most of its length — you’re walking on top of a 60-km river of ice, but it doesn’t feel like a glacier; it feels like a moraine. Urdukas is a grassy ledge above the ice — the last grass — and the views back across to the Cathedral Group, Paju Peak and the Trango Towers are the reason most photographs of the Baltoro exist.

Day 7: Urdukas → Goro II (4,380 m)

A long, slow day on the glacier. Masherbrum (7,821 m) opens up to the south. The pace drops to about 1.5 km/hour as the moraine becomes harder to follow. Goro II is a basic campsite on the ice — cold, exposed, no shelter. Hydrate, eat, sleep.

Day 8: Goro II → Concordia (4,650 m)

This is the day. Concordia is the junction where the Baltoro meets the Godwin-Austen Glacier, and it is the single greatest mountain amphitheatre on earth. K2 due north, Broad Peak beside it, Gasherbrum IV and the Gasherbrum massif east, Mitre Peak south-west, the Baltoro Towers behind you. Four eight-thousanders inside a 20-km radius. Photos do not prepare you. We have rangers who’ve seen Concordia thirty times and still stop walking when they round the last bend.

Day 9: Concordia → K2 Base Camp (5,150 m) and back

Day-walk up the Godwin-Austen Glacier, two to three hours each way, to stand on the moraine below the Abruzzi Spur — the route every K2 expedition has used since 1954. There is nothing here: a few cairns, the wreckage of old expedition gear, the ice itself. The mountain rears 3,500 m above you. Most groups spend an hour here and walk back. Some break down. That is normal.

Days 10–14: Return

The return follows the same route, but faster — Concordia → Goro II → Urdukas → Paju → Jhola → Askole over four days. The walk out is psychologically harder than the walk in, even though it’s downhill. Trekkers cross who they were on the way up.

The Gondogoro La variant (days 9–11)

Strong groups continue from Concordia to Ali Camp (4,950 m), then over the Gondogoro La pass (5,545 m) into the Hushe valley. This is technical: fixed ropes, crampons, a 3 a.m. start, an exposed traverse. Done well, it adds three days and replaces the long return with a beautiful descent into the Hushe valley. Done badly, it’s the most dangerous segment in the park. Operators must carry permits and a guide qualified by the Alpine Club of Pakistan.

The permit and what it covers

You need a CKNP trekking permit (issued at our Skardu office or at the Askole checkpoint), plus a separate fee that goes back into ranger patrols and the SEED-funded campsite waste management on the Baltoro. Bring two passport copies, your itinerary, and your operator’s authorisation letter.

What you should know before booking

• Helicopter rescue: the only realistic high-altitude evacuation is via Pakistan Army aviation. Your insurance must cover this. We are not able to rescue you in any other way once you’re past Paju.
• Solo trekking: not permitted in the Core Zone. You need a registered porter and, for groups of three or more, a guide.
• Porter loads: 25 kg per porter is the maximum. Hire from Askole, not Skardu — the village owns this trail.
• Altitude: 80% of trekkers feel it at Concordia. Diamox prophylaxis is fine; descend if you stop urinating, develop a wet cough, or can’t walk in a straight line.
• Leave-no-trace: use the toilet pits at Paju, Urdukas, Goro II and Concordia. Carry out everything else. The Baltoro is not a forgiving environment for waste.

What it costs (rough)

Cost varies massively by operator, group size, and whether you fly into Skardu or drive the Karakoram Highway. As a guide, an organised K2 Base Camp + Concordia trek with a Pakistani operator runs USD 2,500–3,500 per person for a 16-day package, all-inclusive of permits, food, porters, and Skardu transfers. Self-organising is cheaper but slower — expect to spend three or four extra days arranging porters and supplies in Skardu.

Why this trek matters

The Baltoro corridor was first crossed by a European in 1856 (Schlagintweit), first photographed by the Italian Vittorio Sella on the Duke of the Abruzzi’s 1909 expedition, and first crossed by a tourist trekker (rather than a climber) in the 1980s. We get visitors who’ve trekked Annapurna and Everest Base Camp who tell us this one is on a different scale — bigger mountains, fewer people, harsher country, deeper sense that you’ve walked off the edge of the map.

Treat it with the seriousness it deserves and it’s the trek of a lifetime.