Take morning 7:30 am bus from Puerto Natales Bus terminal to Pudeto . From Pudeto you will catch catamaran to Paine Grande. Try to get on to catamaran a little early to secure a safe spot on the upper deck to enjoy the views of lake . If you have enough time , you can make a detour to a waterfall nearby but before you leave for that , check catamaran timing. In 30 minutes or so – catamaran will leave you at Refugio Paine Grande. Use restrooms at the camping site of Paine Grande as you will not find any restrooms before Refugio Grey.
From Paine Grande start hiking to Refugio Grey. You will get several streams of water to refill the water , so you do not have to stock up on that. While hiking up – you will enjoy the views of Lago Grey from several lookout points. Once you reach Refugio Grey , leave your stuff there and head towards Paso. Before Paso , you will see a former campsite and a platform near it to enjoy the view of glacier from up close. Spend some time admiring the icefield and head back before it tuns dark . Do not go all the way till Paso , it is quite uphill.
Congratulations you are done with Day 1 of the trek , so rest well at night and enjoy your time in Refugio grey. :)
Note : Day 1 hike will be about 19 km and will take 5-6 hours depending on if you go to Paso lookout .
Reservation for Refugio Grey can be done here .
Day 2 ( Refugio Grey – Paine Grande):