1. Acclimatisation is imperative and important if you are planning to participate and run the Surya Devbhoomi Challenge. It depends entirely on one’s personal body condition as some acclimatise very fast and some take several days. We strongly recommend arriving in Harsil or any other high altitude above 6000 feet at least a week to 10 days ahead of race day so that you are well acclimatized for the race. The earlier you arrive, the better it is for you run.

2. Surya Devbhoomi Challenge – participants are advised to arrive at least 7/10 days in advance.

3. High Altitude sickness occurs when you body does not adjust to the altitude due to lack of oxygen. It is common to feel light headed when you arrive Harsil for Surya Devbhoomi Challenge as the air is thin and rarified. Following the rules of acclimatisation, you need to take things easy in order to acclimate properly and not rush around. On arrival it is imperative to take “complete rest” on Day 1. You need to sleep on arrival, go slow, not move around too much and not go to the high points around Nelang. It is also important to keep yourself hydrated so drink plenty of water, soups and avoid alchol for the first few days.

4. With proper acclimatisation, altitude should not be an issue which is the reason we recommend participants to arrive at least a week ahead of race day to prepare themselves. With so much to see and do in Surya Devbhoomi Challenge, you can spend several days and weeks visiting the various sites, enjoying activities like trekking and star gazing and at the same time practicing for Race Day, so participants, come early, enjoy this awesome place and run for Surya Devbhoomi Challenge 2025.