Glen Canyon National Recreation Area encompasses over 1.25 million acres and stretches for hundreds of miles from Lees Ferry in Arizona to the Orange Cliffs of southern Utah, offering unparalleled opportunities for water-based and backcountry recreation amid scenic vistas, geologic wonders, and a vast panorama of human history. Its weather is usually typical for the high deserts, with extremely hot summers that offer little, if any, shade, moderately cold winters with nighttime lows often below freezing, highly variable and unpredictable spring weather with extended periods of wind, and generally nice, mild fall weather.