Trekking in Nepal in Spring Nepal trekking in Spring produces a vista of vibrant landscapes, favorable weather conditions, and unbeatable natural beauty. The spring seasons, from March until May, mark one of the peak seasons for trekking in Nepal with attractive rhododendron forests in full bloom and exceptionally good views of the mountains. Trekking in Nepal in Spring: Some of the local festivals, such as Holi and Buddha Jayanti give grace to the colorful flora along with snow-filled peaks.