As the tree line transitions into barren rock at about 11,000 to 11,500 feet, you have reached the Alpine Tundra Ecosystem. Expect to see sparse vegetation except for patches of moss and some hardy flowering plants. During the next 1,000 feet of your ascent toward the top of Independence Pass, the temperature continues to drop accompanied by strong winds and increasing snowpacks. This landscape is incredible as you approach 2.3 miles above sea level!