The best time to go to Happo depends on whether you're seeking winter sports or summer outdoor activities.For winter sports enthusiasts, December to April is ideal. This period offers reliable snowfall, with January and February typically providing the best powder conditions. The Happo One ski resort, a prominent feature of the area, is fully operational during these months, offering extensive ski runs and snowboard parks. This makes it great for those looking for a dedicated ski or snowboard vacation.If you prefer hiking, mountain biking, or enjoying the alpine scenery without snow, July and August are excellent choices. The weather is warm and pleasant, and the mountain trails are clear. The Happo-ike pond hike, accessible via gondola and chairlift, is a popular activity, offering stunning views of the Hakuba mountain range.