I was a field archaeologist for twelve years, spending most of that outdoors. Some good and some bad. Winter in Baggs, Wyoming. Summer in Hobbes, New Mexico. Spring in the Rocky Mountains. Fall in the Ozarks...
Pay was low, but getting better throughout the business. I started with a college degree at $6.50/hr, but by the time I left most of the jobs I worked were $10-$15/hr, maybe more.
People who worked as "shovelbums" could jump from job to job anywhere in the country as projects became available. "Shovelbums," either on excavations or surveys, could work outdoors nearly 100% of the time. Other people were more academic-oriented (writing, data entry, labratory work, etc.) and their outdoor time could range from 0%-50%.
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My current job is Mudlogger, a sort-of Geologist. I am outdoors quite a bit, but it doesn't feel like it. I work in a small trailer out in the forest, but the view and noise and atmosphere is completely industrial.
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Have you considered ranching or farming? I've done a bit of it, and it's outdoors at least 80% of the time.
-Bob