Land before 9am — Leh's afternoon flight ops get scrubbed regularly. Kushok Bakula Rimpochee Airport to your hotel is 5km, 15 minutes by taxi (₹400-600 prepaid from the airport counter). Check in by noon. Day 1 rule, NO sightseeing, NO shower in hot water (vasodilation worsens AMS), NO alcohol, light vegetarian lunch (thukpa or rice, not buttered), 4L of water minimum, in bed by 9pm. Your blood-oxygen will read 85-88% on arrival even if you feel fine — this is the dangerous deception of arrival fitness. The AMS triad (throbbing headache, nausea, sleeplessness) usually peaks at hours 12-24 after arrival. Diamox 125mg twice a day prophylaxis is the standard, but talk to your GP before flying. Stay: Hotel Singge Palace (₹7,000-8,500/night, Old Leh Road, 4-star with walking access to Main Bazaar), The Grand Dragon Ladakh (₹6,500-12,000/night, Sheynam, oxygen-equipped rooms), or budget Hotel Lasermo / Changspa Road guesthouses ₹1,500-2,500/night. Hazard: do NOT take a sleeping pill tonight — it suppresses the breathing reflex you need at this altitude. Tomorrow: still no driving. The temptation to 'do something' is strong; resist.

Acclim Day 2 — gentle activation only. Wake without alarm. If you feel ANY breathlessness at rest, stay flat with fluid breakfast at the hotel café and rest until lunch. If you feel okay, breakfast at Lehvenda Café or Bon Appetit on Main Bazaar (₹250-400). Visit Shanti Stupa (climb the steps slowly — pause every landing), Leh Palace (steeper than it looks, take the back-road taxi up if heart-rate spikes), and Hall of Fame Museum near the airport (Indian Army memorial, sobering and informative, free). Lunch at The Tibetan Kitchen on Fort Road for honest momos and gyathuk (₹400-600/head). Afternoon: book your Inner Line Permit/PAP at the DC office on Old Leh Road or have your hotel travel desk arrange it (₹400 + ₹20/day for Indians via lahdclehpermit.in; foreigners need a Leh-registered agent — allow 2-3 hours processing). Buy fuel at the Skara Road Indian Oil pump — the most reliable in Leh. If renting a bike, today is pickup-and-test-ride day: Pankaj Garage on Skara Road or Royal Garage on Fort Road both rent RE Himalayan and Classic 350 from ₹1,500-2,500/day. Hazard: Leh's afternoon UV is brutal at this altitude — SPF 50 is not optional even on cloudy days; sunburn AT 3,500m is a real medical issue, not a vanity one. Stay: same as Day 1. Tomorrow you climb 1,800m in 4 hours.

Depart Leh 7am sharp — Khardung La's south ramp is shaded and icy until 10am. Temperature at Leh: 8-12°C; on the pass top: -2 to 4°C even in July. Layer: thermal + fleece + windproof shell, plus glove liners. Tank up before South Pullu (24km from Leh). The climb hits 21 hairpins between South Pullu and the summit at 5,359m GPS / 5,602m per the BRO sign — the army-run café offers oxygen ₹50/whiff if needed; spend MAX 15 minutes at the top. Descend to North Pullu, then 50km to Khardung village (intermittent pump — do not rely; small dhabas, Maggi ₹80), and on through the Shyok confluence to Diskit (reliable fuel pump here, the first since Leh). Stop at Diskit Monastery for the 32m Maitreya statue facing the LoC ridges. Final 9km of dunes road to Hunder. Stay: Sand Dunes Retreat (₹6,000-8,500/night, walking distance to dune sled-and-camel point), Stone Hedge (~₹15,000-22,000/night, premium boutique), or budget guesthouses in Hunder village ₹1,200-2,000/night. Sundown camel ride at Hunder dunes — Bactrian double-humped camels, ₹400-600 for 15 minutes. Hazard: do not drink the irrigation channel water in Nubra — bottled or filtered only. Tomorrow: the longest single drive of the entire trip.

Biggest driving day of the loop — 280km through the Shyok valley. Set alarm 5:30am, on the road by 6:30am. Breakfast packed from your Hunder hotel (parathas + boiled eggs + bananas, ₹200). The Shyok valley route from Nubra to Pangong (Diskit — Agham — Shyok village — Tangtse — Pangong) is mostly tarmac, with 1-2 dirt sections and 4-5 shallow river crossings depending on snowmelt. CRITICAL hazard: cross all stream beds before noon when snowmelt runoff is at its lowest — the Shyok runs aggressive in July afternoons. The Khalsar landslide zone (just past Khalsar village) has dropped boulders onto the road in 4 of the last 6 monsoons; check road status before committing. Tangtse is the only mid-route civilisation — small dhabas serving Maggi + thukpa (₹120-180), last reliable lunch stop. Pangong's first sight — indigo lake suddenly appearing from behind the brown hills — is at Lukung. Drive the shoreline 8km to Spangmik for your overnight. Stay: Pangong Retreat Camp (Premium ₹4,500-15,000, Luxury ₹4,000-13,000 — 25 Swiss tents with attached bath, hot/cold water), Pangong Delight Camp (₹3,500-7,500/night, 12 Swiss cottage tents lakeside), or Camp Redstart from ₹4,500/adult. Pangong sits at 4,250m. Hazard: every camp tent here is COLD at night — ask for a bukhari heater on arrival, but do NOT run the heater while sleeping (CO poisoning risk). Tomorrow: return via Chang La.

Return day via Chang La (5,360m), the second-highest pass of the loop. Depart 7:30am after camp breakfast (porridge + parathas + chai, ₹200-300). Drive Spangmik back to Lukung, then turn south through Tangtse and the climb to Chang La. The pass top has an army-run cafeteria serving hot tea (₹40, no charge for the famous 'Chang La tea' — army hospitality), but spend max 15 minutes — even more than Khardung, Chang La is exposed and cold. Descend to Karu (fuel pump, top up here — the only reliable pump between you and Leh). En route to Leh, choose ONE: Hemis Monastery (founded 1672, Drukpa Kagyu lineage, the famous Hemis Festival is end-June with masked cham dances) OR Thiksey Monastery (the photogenic 'mini-Potala' on a hill, 12 storeys, 14m Maitreya Buddha inside the main hall). Both are 30-45 minutes from the highway. Lunch at Thiksey monastery café (basic thali, ₹250-350) or push through to Leh by 4pm. Hazard: bike crashes peak on the Karu-Leh stretch in late afternoon — fatigue + the long Indus valley straights lull riders. Discipline yourself off the bike if woozy. Stay: same hotel as Days 1-2. Long hot shower, eat early. Tomorrow: lighter Indus valley sightseeing day.

Indus valley monuments day — a low-altitude (3,500m) recovery day with sightseeing. Breakfast slowly at the hotel by 9am. Drive west out of Leh on the Srinagar highway (NH1) for the Sangam viewpoint (Indus + Zanskar river confluence at Nimmu, 35km from Leh — turquoise meets brown, dramatic) — visit time 30 minutes, ₹50 parking. Continue 5km to Magnetic Hill (a famous gravity-illusion stretch where parked vehicles appear to roll uphill — physics is just an angled-horizon trick, but worth the photo) — 15 minutes. On the return, stop at Gurudwara Pathar Sahib (10km outside Leh, Indian Army-managed, free — the langar serves rajma-chawal to all visitors, ₹0). Visit time 45 minutes. Lunch back in Leh at Lamayuru Restaurant on Fort Road (₹400-600). Afternoon: souvenir shopping at Main Bazaar (apricot oil ₹200-400/bottle, pashmina ₹2,000-15,000 depending on grade — the LAMO certification is the only authenticity mark; many roadside 'pashmina' shawls are blends), Tibetan thangkas ₹500-15,000. If renting a bike, return it today with photos of any new damage. Hazard: do not buy undeclared antiques over 100 years old — Leh airport security routinely seizes Buddhist artefacts and possession can mean a fine + travel ban. Pack tonight. Stay: same as previous nights. Tomorrow: depart.

Departure morning. Do not plan flights before 10am — Leh's weather window collapses around noon and pre-noon flights have a 25-30% cancellation rate. Transfer to Kushok Bakula Rimpochee Airport 90 minutes before flight time. Every checked bag is hand-screened at this military-controlled airport — security takes 60-90 minutes minimum. Hazard: lithium-ion batteries are confiscated if found in checked baggage — must be in cabin only (max 100Wh per battery, max 2 spare batteries per passenger). If your flight is cancelled (it happens), the airline will rebook to next-day same time but you'll need to find a hotel by 11am with thousands of others doing the same — keep your previous hotel's number on speed-dial. Trip ends. Reflection: you crossed two of India's highest passes (Khardung La 5,359m, Chang La 5,360m), slept above 4,000m for one night, drove ~700km, and saw the marquee triad — Khardung, Nubra, Pangong — in the minimum responsible window. The 12-day version adds Sarchu, Pang, Tso Moriri and the Manali highway; the 6-day Khardung-only loop drops Pangong. This is the sweet spot.