Density Altitude and Performance
All aircraft, including those with turbocharged engines and even jets, are adversely affected by altitude. Many smaller airplanes have service ceilings not much above the height of these magnificent mountains and, consequently, their performance is critically degraded in this region. However, a powerful engine alone--while it certainly simplifies many aspects of mountain flying--is not a panacea in the high country. Downdrafts can reach velocities comparable with those found in microbursts, and not much short of a military jet will outclimb such winds. On the other hand, you'll see many gliders flying in and near the mountains, demonstrating that even lower powered craft can enjoy the mountains safely provided that proper precautions are taken, and provided you're willing to head home--or stay on the ground--when conditions are unsuitable.
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