I drove Manali to Leh in September. Here's what broke.

Why September, and why I'd rethink it

Everyone told me September was the sweet spot: crowds gone, road still open, apricot harvest in the villages. Two of those are true. The third depends on the week. The BRO officially keeps the highway open through late September, but the road surface after four months of monsoon and truck traffic is a different animal than what May and June travellers describe. We hit five active landslide zones between Jispa and Sarchu.

If I had the trip back, I'd go the second week of June (road just opened, thin traffic, clean surface) or the last week of August (green Lahaul, low pressure on hotels). Late September only works if you can be flexible about turning back.

How the four days actually went

1. Day 1: Manali to Jispa (5.5h). Rohtang tunnel took us through in 12 minutes what used to be a 3-hour pass. We stopped at Sissu Lake for lunch (fried Maggi, ₹80, still the best trip meal). Reached Jispa at 4pm and stayed at Hotel Ibex, ₹1,800 for a double.
2. Day 2: Jispa to Sarchu (4h drive, but 7h door to door with two BRO stops). Two things went wrong. The fuel line got clogged with grit from a monsoon washout past Zingzingbar, cost us 90 minutes and a bribe of ₹500 to a passing mechanic. And Sarchu, our booked overnight, sits at 14,070 ft. My friend Aakash started throwing up at dinner.
3. Day 3: Aakash was in early HAPE territory. We made the call to descend, not push over Tanglang La. Drove back to Jispa (2,300 m lower), which felt like the right call by 8pm. Lost a day.
4. Day 4: Second attempt. Sarchu to Leh in a single push, 8.5 hours including the four passes (Nakee La, Lachalung La, Tanglang La, and the final descent past Rumtse). Reached Leh at 6pm. All three of us on Diamox by then.

Sarchu is the wrong overnight stop

Every travel blog schedules Sarchu as the day-2 stop. Do not do this on your first Ladakh trip. Sarchu is at 14,070 ft (4,290 m), higher than Leh itself, and you've just spent 8 hours climbing to get there from 3,000 m Jispa. Your body has had zero acclimatisation time.

The right sequence: Manali → Jispa (3,200 m, one night). Jispa → Keylong (short backtrack, sleep at 3,050 m one more night to be safe). Then push through to Leh in one day. You spend an extra night in Lahaul but you don't lose a day to altitude sickness. Cost difference: about ₹1,500 for the extra Keylong night. Worth every rupee.

Two logistics things nobody mentions

• Tandi is the last real fuel stop for 365 km. This is on every blog. What's NOT on every blog: Tandi's pumps run dry in September. We reached at 11am and they were out. Had to wait 90 minutes for a tanker. Fill up in Keylong the evening before as a hedge.
• Cash. There is no working ATM between Manali and Leh. None. The BRO cafeterias take UPI but the intermittent connectivity means transactions fail. I ran out at Pang and had to borrow ₹2,000 from a Delhi biker to pay for dinner. Carry ₹15,000 minimum per person in cash.

What I'd redo

1. Start Diamox 24 hours BEFORE leaving Manali, not once symptoms show up. 250 mg twice a day.
2. Split the drive into 4 days minimum. Manali → Jispa → Keylong → Sarchu (day trip up, back down to Jispa to sleep) → Leh via Sarchu. Yes, this doubles some kilometres. Do it anyway.
3. Rent a car with a known-good driver, not self-drive. Our Thar was fine but a Delhi friend on the same route lost his clutch at Nakee La and paid ₹35,000 to get towed. A hired driver has the mechanic's number and knows which garage takes UPI.
4. Have a plan-B budget for one flight leg. If altitude gets bad, one of you flies out of Leh (₹6,000 to Delhi) and the other drives back solo. It's a legitimate exit.