The forest around Sangkhlaburi is wilder and less visited than most trekking destinations in northern Thailand. 'Jack', who has years of experience as a guide, can tailor trips for different fitness levels and for family groups, but the most adventurous option is a week hiking the Myanmar border from Sangkhlaburi to Um Phang, staying in Karen villages along the way.

Prices depend on group size and trip length, but expect 2000B per person per day for three people or more. You'll need to bring your own tent and sleeping bag, or pay extra to hire one.