Thailand forum

Most of the northern trekking takes place in the hills above 1000M, especially the multi-day treks that allow time to get higher. This will help to escape the heat even during the hottest time of the year. The first big rains of the season usually arrive in May, but it's usually a quick and heavy downpour which also takes the edge off the heat. Be prepared for mixed wet/warm conditions and bring some good shoes with decent tread because you're likely to be dealing with muddy trails. No need to choose anything far in advance, and in fact you can easily arrange trekking a day in advance at any of the hundreds of guesthouses and travel agents in Chiang Mai or other busy towns like Pai, Chiang Rai, and Mae Hong Son. Just compare prices and people so you're happy with the deal. Most guesthouses will hold a room for you and store your big bag if you book trekking with them. They also usually give you a list of recommended things to bring with you and provide a daypack if you need it. Group-based treks are the cheapest with 10-12 people at around 1200/1500 baht for 2/3-day treks. Enjoy.