The best periods for trekking in Bhutan are October- November and March- May for all high altitude treks going over 4,000m. Some short treks like the Druk Path, Bumthang, Gantey can be undertaken almost every season. In the autumn, clear warm days prevail affording the mountain views. In spring mixed weather patterns prevail with clear spells followed by occasional thunder showers and light rain. Spring is the best because rhododendrons, magnolias and other plants are in bloom.