system
Given the following post, respond as if you're commenting on Reddit:
human
ElI5: Why don't we launch rockets off mountains?

Why doesn't NASA launch rockets off the Rockies or some other mountain range? Wouldn't it save a lot off fuel because there would be less gravity and less distance to travel to get into orbit?
gpt
they're not really worried about the 2-10k feet when they calculate the cost of fuel. the effect of less gravity is also pretty negligible. they'd also have to calculate in the cost of trucking all the equipment, payload, and what not up the mountain to launch. the rockies are also covered in snow a good portion of the year, that would add some more difficulties in the form of hostile environments and delays caused by weather.