Key Points of Hampta Pass Trek. Duration: – 4 Nights 5 Days from Manali to Manali. Base camp: – Manali. Monsoon Temperature:- Day 5°C to 12°C) Night 2° C to 8° C. Hampta pass trek- Altitude: – 4310 Meters. Best Time: – June, July, August, September. Trek Level: – Moderate. Trek distance: – On foot 29 Km – By taxi 236 km