[madnak]

Regardless of the poll results, there's surely a correlation here as atheists are more common in urban areas, where "outdoorsmen" (do people actually use that word any more?) are uncommon for obvious reasons. When I lived in Boone, NC I got out often. Now in Brooklyn, with no vehicle and little money, the best I can do is walk my dogs in the park or along the waterfront.

This suggests nothing about, say, appreciation of nature's splendor. Which is, I assume, your angle - "people who spend time in the outdoors see God's beauty and so they believe and blah blah blah irrational."