Jackson Hole has two distinct peak seasons with a quiet shoulder in between. Winter (December to April) is for skiing — Jackson Hole Mountain Resort is at its best from January to March, with deep powder and cold, clear days. The National Elk Refuge sleigh rides run from late December through March. Spring (May–June) is the quietest time, with patchy snow lingering and some roads in the national park still closed, but wildflowers beginning and wildlife very active as bears emerge from hibernation.
Summer (July–August) is the busiest season — the national park is at full capacity, accommodation is at peak prices, and popular trailheads fill their parking lots by 7am. But the hiking is superb, the days are long, and wildlife viewing is excellent. September and October are arguably the best time to visit: the crowds thin after Labor Day, the aspens turn gold and orange, elk rut is in full swing (dramatic to witness), and temperatures are cool but comfortable.