This is the most important question. we would like to inform you; in Nepal, we have 2 trekking seasons in a year; spring and autumn. As you know autumn (mid of September to November) and spring (March to May) are the best time for the Nepal Himalayan trip. Especially, Spring is the best time for amazing mountain scenery as well as to see the Rhododendron Blooming (Nepal’s National flower). As you are asking about May; is the perfect time to trek in Manaslu Circuit. You will meet some expedition groups also during this trek. This is a great chance to interact with them about climbing.