According to your schedule, the Snowman Trek route will take you via eleven to fourteen mountain passes above 4000 meters. Due to the high altitude, you may only do this journey in late September or early October, just following Bhutan's severe rainy season and before the arrival of winter snow. If you want more information about the Bhutan trek, you can ask Bhutan Inbound . Read More:https://www.bhutaninbound.com/trekking-in-bhutan/snowman-trek-ii