Keystone, Colorado

Spring (April to May):

• Spring is a transitional season in Colorado. The weather varies, with warming temperatures and occasional snowfall in the mountains. Lower-elevation areas like Denver and Boulder experience milder weather. Spring is a quieter time to visit mountain towns before the summer crowds arrive. It's a good time for early-season hiking and wildlife watching.

Summer (June to August):

• Summer is a popular time to visit Colorado, especially in the mountainous regions. The weather is warm, with daytime temperatures typically ranging from the 70s to 80s Fahrenheit (21-30°C) in the mountains. This is the best time for outdoor activities such as hiking, mountain biking, white-water rafting, and camping. Popular destinations like Aspen and Vail offer festivals, music events, and vibrant outdoor scenes. Be prepared for occasional afternoon thunderstorms, especially at higher elevations.

Fall (September to October):

• Fall is a fantastic time to visit Colorado, particularly for leaf-peeping enthusiasts. The aspen trees turn vibrant shades of yellow and gold, creating breathtaking landscapes. The weather is generally pleasant, with daytime temperatures ranging from the 60s to 70s Fahrenheit (15-26°C). This is an ideal time for hiking, scenic drives, and exploring the mountain towns.

Winter (November to March):

• Winter in Colorado is famous for world-class skiing and snowboarding. Resorts like Aspen, Breckenridge, and Telluride offer excellent winter sports opportunities. The ski season typically runs from late November to early April, with the best conditions in December and January. Be prepared for cold temperatures, especially in higher elevations, and check for avalanche advisories if you plan backcountry activities. Winter is also a great time for cozying up in mountain lodges and enjoying hot cocoa by the fire.

Note on Altitude:

• Colorado's high elevation can affect travelers, especially if they are not acclimated to the altitude. Symptoms of altitude sickness can include headaches, nausea, and shortness of breath. Take it easy, drink plenty of water, and allow time to adjust when traveling to higher elevations.